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You finally get everyone settled. The dishes are done. The emails can wait until tomorrow. The house is quiet. You climb into bed exhausted, ready for sleep—and suddenly your brain decides it's time to review every conversation, every unfinished task, every future possibility, and every mistake you've ever made.
If you've ever found yourself staring at the ceiling wondering, Why can't I shut my brain off at night? you're not alone.
In this episode of The Dr. Brighten Show, Dr. Jolene Brighten, board-certified naturopathic endocrinologist, Certified Menopause Specialist through The Menopause Society, certified sex counselor, and author of the upcoming book ADHD and Women, explores why overthinking at night is often far more complex than a simple sleep problem.
Many women blame themselves when they can't fall asleep. They assume they're bad at relaxation, meditation, stress management, or sleep hygiene. But what if your racing thoughts aren't a personal failure? What if your brain is responding exactly as it was designed to?
Drawing on clinical experience helping women navigate ADHD, hormone changes, perimenopause, chronic stress, and nervous system dysregulation, Dr. Brighten explains why your mind may become loudest when the world finally gets quiet.
In this episode, you'll discover how cortisol, blood sugar regulation, dopamine, estrogen, progesterone, hypervigilance, and nervous system activation all influence your ability to rest—and why understanding your physiology can be one of the most powerful steps toward reclaiming your sleep.
Overthinking at Night: What You'll Learn in This Episode
If you've ever felt exhausted but unable to sleep, this episode provides a new lens through which to understand what's happening inside your body and brain.
Listen to discover:
- Why overthinking at night may not actually be anxiety
- The surprising reason your brain becomes busiest the moment your head hits the pillow
- How chronic stress can flip your cortisol rhythm and leave you wired but tired
- Why women often confuse hypervigilance with personality traits like perfectionism and responsibility
- The hidden role of your nervous system in keeping you awake long after your day is over
- How ADHD in women frequently shows up as overthinking, internal pressure, and mental overload
- Why high-achieving women often unknowingly use stress hormones as their primary source of motivation
- The biological reason absolute quiet can feel uncomfortable instead of peaceful
- How blood sugar crashes may contribute to waking up between 2 and 3 AM
- Why estrogen and dopamine have a powerful relationship that affects focus, mood, and sleep
- How perimenopause can intensify racing thoughts, forgetfulness, and mental overwhelm
- The critical role progesterone plays in helping your brain access calm through GABA signaling
- Why your brain may be trying to protect you—not sabotage you
- The powerful question Dr. Brighten recommends asking yourself when nighttime thoughts begin spiraling
- How to shift from self-blame to self-understanding when sleep becomes difficult
By the end of this episode, you'll understand why your nighttime overthinking may have less to do with willpower and much more to do with biology.
Why Overthinking at Night Happens: The Connection Between Your Brain, Hormones, and Nervous System
One of the most important concepts explored in this episode is that overthinking at night rarely begins with the thoughts themselves.
Many women approach racing thoughts as if the thoughts are the problem. They attempt to think their way out of thinking. They search for the perfect meditation app, the perfect nighttime routine, or the perfect mindset strategy.
But according to Dr. Brighten, a racing mind is often a symptom rather than the root cause.
For many women, nighttime overthinking reflects years of carrying responsibilities, anticipating problems, managing schedules, supporting family members, and remaining constantly alert to the needs of others.
Over time, the brain learns a powerful lesson:
Stay vigilant. Stay prepared. Stay ahead of potential problems.
The challenge is that your brain doesn't automatically understand when the workday is over.
If you've spent years being the person who remembers birthdays, tracks appointments, notices emotional shifts in family members, solves problems before they happen, and keeps life running smoothly, your nervous system may become accustomed to operating in a state of constant surveillance.
At bedtime, when external distractions disappear, internal activity often becomes more noticeable.
The Hidden Burden of Being “On Duty”
One of the most powerful questions posed in this episode is:
When was the last time you truly felt off duty?
Not scrolling social media while mentally planning tomorrow.
Not taking a bath while listening for someone to call your name.
Not resting while simultaneously managing everyone else's needs.
Many women struggle to answer this question.
This chronic sense of responsibility can create a nervous system that remains activated even when the body desperately needs rest.
According to Dr. Brighten, overthinking may not be evidence that something is wrong with you. It may be evidence that your brain has become exceptionally skilled at protecting you.
ADHD in Women and Nighttime Overthinking
Another important topic explored in this episode is the connection between ADHD and racing thoughts.
Historically, many girls and women with ADHD went undiagnosed because they didn't fit the stereotypical presentation often seen in boys.
Instead of physical hyperactivity, many women experienced:
- Daydreaming
- Perfectionism
- Internal restlessness
- Excessive talking
- Mental overwhelm
- Chronic self-pressure
- Emotional intensity
To cope, many developed sophisticated systems powered by anxiety and urgency.
Fear of forgetting became motivation.
Stress became organization.
Pressure became productivity.
As a result, some women unknowingly train their nervous systems to depend on stress hormones to accomplish everyday tasks.
When bedtime arrives and external demands disappear, the brain may continue generating internal stimulation through thoughts, worries, planning, and mental activity.
The Physiology Behind Feeling Wired But Tired
One of the most important physiological concepts discussed in this episode is HPA axis dysregulation.
The HPA axis refers to the communication system between the brain and adrenal glands that helps regulate stress responses.
Under normal circumstances:
- Cortisol rises in the morning
- Energy increases
- Cortisol gradually declines throughout the day
- Melatonin rises in the evening
- Sleep follows naturally
However, chronic stress can disrupt this rhythm.
Some women experience elevated evening cortisol levels that leave them feeling physically exhausted but mentally alert.
This creates the classic experience of being tired all day and awake all night.
Blood Sugar and Middle-of-the-Night Wakeups
Dr. Brighten also discusses the relationship between blood sugar regulation and sleep disruption.
When blood sugar drops too low overnight, the body may respond by releasing cortisol and adrenaline to restore glucose levels.
This can contribute to:
- Waking between 2 and 3 AM
- Racing thoughts
- Increased heart rate
- Night sweats
- Difficulty returning to sleep
Many people assume these awakenings are purely psychological.
In reality, your body may be responding to physiological signals that it interprets as a threat to survival.
How Hormones Influence Overthinking at Night
Hormones play a major role in how the female brain processes stress, focus, emotions, and sleep.
Dr. Brighten explains the close relationship between estrogen and dopamine.
Dopamine supports:
- Focus
- Motivation
- Working memory
- Emotional regulation
- Prioritization
When estrogen levels fluctuate—as they often do during perimenopause, postpartum recovery, PMS, or other hormonal transitions—dopamine signaling can be affected as well.
This may contribute to:
- Brain fog
- Mental overwhelm
- Difficulty concentrating
- Increased distractibility
- Racing thoughts
Many women interpret these changes as personal shortcomings.
Instead, they may represent shifting neurochemistry.
Progesterone, GABA, and Calm
The episode also explores progesterone's role in promoting relaxation.
Progesterone is converted into a compound called allopregnanolone, which interacts with GABA receptors in the brain.
GABA helps create feelings of calm, relaxation, and safety.
As progesterone levels decline during certain phases of life, some women may experience:
- Increased anxiety
- Difficulty sleeping
- Greater sensitivity to stress
- Increased nighttime overthinking
Understanding these hormonal influences can provide important context for symptoms that often feel confusing or frustrating.
The Most Important Reframe
Perhaps the most important takeaway from this episode is this:
Your brain is not broken.
You are not failing at rest.
You are not bad at relaxation.
Your nervous system may simply be operating from an old survival strategy that has become difficult to turn off.
When you understand the biological factors contributing to overthinking at night, you can begin replacing self-criticism with curiosity.
Instead of asking:
“What's wrong with me?”
You can begin asking:
“What is my brain trying to protect me from right now?”
That shift alone can be incredibly healing.
This Episode Is Brought to You By
Dr. Brighten Essentials Adrenal Calm
For the nights when your body is exhausted but your brain missed the bedtime memo, Adrenal Calm helps support a calmer stress response and deeper, more restorative sleep.
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Links Mentioned in This Episode
- The Truth About Hormones for Sleep, Sleep Disturbances, Melatonin & Perimenopause Sleep Problems | Dr. Jolene Brighten
- ADHD, Sleep & Hormones: Why Your Brain Won’t Shut Off at Night
Frequently Asked Questions
Overthinking at night can occur when your nervous system remains activated after a stressful day. Hormones, blood sugar fluctuations, ADHD, hypervigilance, and cortisol dysregulation may all contribute.
Many people experience racing thoughts because their brains have become conditioned to stay alert, solve problems, and anticipate future needs. This may be influenced by both psychological and physiological factors.
Yes. Changes in estrogen, progesterone, dopamine, and GABA signaling can affect mood, focus, emotional regulation, and sleep quality.
It can be. Blood sugar fluctuations and stress hormone responses may contribute to middle-of-the-night awakenings in some individuals.
Many women with ADHD experience racing thoughts, mental overload, perfectionism, and internal restlessness, which can become more noticeable at bedtime.
Hormonal fluctuations that affect dopamine, progesterone, and other neurotransmitter systems may increase symptoms such as anxiety, insomnia, brain fog, and mental overwhelm.
If you've ever wondered why your brain seems unable to rest when your body is desperate for sleep, this episode offers a compassionate, science-based explanation. Understanding what's happening beneath the surface may be the first step toward finally giving yourself permission to stop carrying the weight of the world into bed every night.
Dr. Jolene Brighten is a board-certified naturopathic endocrinologist, a Fellow of the American Board of Naturopathic Endocrinology (FABNE), a Menopause Society Certified Practitioner (MSCP), a nutrition scientist, and a certified sex counselor through the Sexual Health Alliance. As a licensed physician maintaining an active DEA license and full prescriptive authority, her educational frameworks align with leading global standards, including ESHRE and The Menopause Society. She serves as a faculty member for the American Academy of Anti-Aging Medicine (A4M), acts as the Lead Researcher for the Brighten Essentials Research Division, and is currently directing ongoing scientific research initiatives to advance clinical care standards for women navigating complex endocrinology, neurodivergence, and tissue-specific hormone sensitivities.
Transcript
[00:00:00]
Dr. Brighten: Hey friend, welcome back. I want to invite you to pull up a chair, get cozy, and let's take a collective deep breath together because today we are tackling a quiet epidemic that is keeping millions of women exhausted, lonely, and staring at their ceilings in the dark night after night. So take that breath and I want you to picture this.
Ten forty-seven PM, dishes are finally in the dishwasher. Kids are asleep. The house is finally quiet. The emails are paused until tomorrow, and then you crawl into bed, pull the covers up to your chin, and for the very first time all day long, absolutely nobody needs anything from you. That's a good feeling, right?
But then right on cue, the exact second your head hits the pillow, your brain decides to hold an emergency corporate board meeting. It's not a quick check-in. [00:01:00] It's a full presentation with no agenda and no end time. And suddenly you're replaying the text message you forgot to return, the dentist appointment that you need to schedule, and the slightly awkward thing that you said to a coworker three days ago, but now it's like the worst thing that you ever did.
And then your brain decides to show off its range, jumping seamlessly from tomorrow's grocery list to an existential crisis about your entire future. Your physical body's utterly spent, right? But your mind is running a marathon, and you just can't get to sleep. And you lie there and you're thinking, "Why can't I just turn this off?
What's wrong with me? Where's the switch for my brain? Did I lose it somewhere?" If you've lived this script once, twice, maybe a thousand times, I want you to hear me loud and clear before we go a single step further You're not lazy, you're not failing at [00:02:00] meditation or mindfulness, and you are not broken because peace feels impossible to access.
Most health advice frames this purely as a sleep hygiene problem. They'll tell you, you know, wear your blue light-blocking glasses, uh, you know, stay off your screens, drink chamomile tea. All, all valid, but as a doctor, I look at this through a completely different lens. What if your brain isn't refusing to turn off?
What if it simply doesn't feel safe enough to close its eyes? Today, we're gonna dive deep into why the quietest moment of your day often becomes the loudest moment in your head. We're going to look at your nervous system, your hormones, and a massive missing piece for millions of women: undiagnosed or unsupported ADHD.
By the time we finish our conversation today, you aren't just going to have a list of more things to do. I get it. We don't always just need more [00:03:00] things to do. In fact, you're gonna have an understanding of your physiology so deeply when you walk away from this conversation, that you will realize you've actually been doing an incredible job at protecting yourself.
You're going to feel a profound sense of accomplishment just for realizing how smart your body has been all along And that is my hope for today's episode for you
Welcome back to The Dr. Brighten Show. I'm your host, Dr. Jolene Brighten. I'm board certified in naturopathic endocrinology, a certified menopause practitioner, a certified sex counselor, and I'm the author of the upcoming book, ADHD and Women. If you find a moment of peace or an aha moment at all in today's episode, please just take a quick second to like, comment, share, subscribe.
This helps this podcast reach the people who need it, and certainly pass this to the friend who is likely awake at 11:00 PM overthinking right along with you. Now, [00:04:00] let's talk about what is actually happening beneath those racing midnight thoughts
. when we find ourselves overthinking at night, we treat the thoughts themselves as if they're the enemy, and we try to think our way out of thinking. I know it sounds silly, right? But it's literally what we're doing. But a hyperactive mind at midnight is rarely just about the random thoughts. It's about a deeply ingrained sense of survival and responsibility.
When a patient sits across from me and says, "Dr. Brighten, I just can't shut my brain off," I don't see someone who's just casually worrying for fun. I see a woman who has been on high alert duty all day long, sometimes for years on end. You aren't analyzing things because you want to. It's not a choice.
You're analyzing them because a fundamental part of your subconscious believes that if you stop tracking the variables, something catastrophic will fall apart. And frankly, your brain is [00:05:00] entirely justified in believing that. If you are the person who remembers the birthdays, you anticipate the grocery shortages, you notice when a family member is having a bad day, and you're the one who fixes operational crises before anyone else even registers there's a problem, your brain has learned that vigilance is a highly successful strategy.
It builds a neural pathway that says, "Keep scanning, keep anticipating, keep everyone safe." And that has evolutionary benefits, right? But at eleven PM, you suddenly ask your brain to drop its guard, to soften. It doesn't know how. It's like asking a highly trained guard dog to instantly transform into a sleepy lap dog just because you changed rooms.
It is still on shift. It's still on duty. So let me ask you a really honest question. When was the last [00:06:00] time you felt truly, entirely off duty? I don't mean scrolling social media while mentally building tomorrow's to-do list. I don't mean taking a bath while keeping one ear open for someone calling your name.
I mean zero things to manage, zero things to prove, and zero expectations to meet. For most women, that question brings an uncomfortable silence because the honest answer is most of us have no idea. If that's you, I want you to congratulate yourself right now for recognizing it.
Acknowledging that your brain has been working overtime to protect your life is the very first step in reclaiming your peace. Your brain is not broken. You're not dysfunctional. Your brain, it's just incredibly loyal to your survival.
Over time, however, this constant hypervigilance leads to an unspoken, dangerous agreement inside our minds. If I can just stay five steps ahead [00:07:00] of everything, nobody will be disappointed in me. If I keep overthinking, I can maintain control. This is precisely where we have to bring ADHD into the conversation, because millions of adult women are walking around with brains that function this way without ever realizing they have a neurodivergent profile.
Think back to your childhood. The medical model historically has missed girls with ADHD because they weren't little boys bouncing out of their school chairs. Instead, the girls were often the daydreamers, the perfectionists, the hyper talkative ones, or the ones who seemed incredibly capable on the outside, gifted student, honor roll, but felt absolutely like a chaotic whirlwind on the inside Now, if that was your experience, you learned a very specific coping mechanism to survive a neurotypical world.[00:08:00]
You learned to use internal pressure and anxiety as your primary organizing system and motivation. You learned that urgency could be used as fuel. Anxiety became your calendar reminder app. Fear of failure, that became the backup plan, right? You literally trained your nervous system to produce stress chemicals just to get the mundane tasks done.
And at a very young age, the little girl inside you, she learned that mistakes were not just unacceptable, mistakes were dangerous. So when the physical world finally gets quiet at night, your brain begins to panic. To an ADHD brain that has relied on high-stakes adrenaline to function all day, absolute quiet doesn't feel like peace.
It feels like a sensory vacuum. It feels dangerous. So it manufactures thoughts to [00:09:00] create the internal stimulation it thinks it needs to stay safe. And this can happen to anyone, not just ADHDers, okay? Now, when you look at it through this lens, you realize something really liberating. Sometimes an overthinking brain isn't anxious, it's overburdened.
It has been running on an old survival script for so long that constant movement feels like the only way to stay alive. Just understanding that fact means you are no longer fighting yourself. You are finally starting to decode your unique mind and how it actually works And like I said, this doesn't just happen to ADHDers.
We see this in perimenopause. We see this with people who have PTSD. We see this in chronic HPA axis dysregulation. So let's look at this now through a physiological lens, because this is where my doctor brain gets incredibly [00:10:00] passionate. We've all seen two people handle the exact same level of stress completely differently.
One person has a chaotic day, hits the pillow, falls asleep four minutes flat. Another person, through the same exact day, lies awake replaying every single interaction since breakfast. Why is that? Is the first person just better at meditating? Are they just more disciplined? Are they better at life? That's not the answer.
It's absolutely not the answer. The difference isn't a lack of willpower. It's a reflection of the biological capacity. Your mind is not a separate entity floating above your body. Your thoughts are quietly manufacturing your biochemistry, and your biochemistry is shaping your thoughts. So when a woman tells me that she feels wired but tired, that isn't a psychological complaint.
It's a classical medical description of a nervous system stuck in a specific phase of [00:11:00] stress response, what we call HPA axis dysregulation, how the brain and the adrenal glands are communicating. Normally, your body relies on a beautiful cortisol curve. It's high in the morning to give you energy, and then it tapers off smoothly in the evening so that melatonin can take over and guide you into deep sleep.
But when you experience chronic unremitting stress, that curve, it gets flipped. Your body pumps out cortisol late in the evening, leaving you physically exhausted but biologically wide awake. At the ex-exact same time, your brain is tracking your blood sugar. If you skipped lunch because you were too busy taking care of everyone else, or if you ate a quick carb-heavy dinner on the run, your blood sugar can crash at two to three AM, spiking cortisol all over again.
When your blood sugar or glucose drops, your brain interprets that drop as immediate starvation [00:12:00] emergency. It instantly secretes a surge of adrenaline and cortisol to raise your blood sugar back up. Suddenly, you're awake, cold sweat. Your heart is racing, your brain is racing, and your brain is immediately looking for a problem to solve because your biochemistry, your hormones, just told it you are in immediate danger, and that's when we see you wake up feeling exhausted.
You don't wake feeling rested 'cause cortisol's not rising in the morning the way it should either. Now, look at what we just unraveled here together. You thought you were waking up and staying awake because maybe you thought you were an anxious overthinker or, um, that you just can't handle stress. In reality, you have a brilliant brain.
It was simply reacting to a drop in blood sugar and a dysregulated cortisol curve. It was doing exactly what it evolved to do to keep you alive. Just knowing that is gonna shift you from self-blame [00:13:00] to that clinical clarity of what is actually happening in your body. Let's take this one step deeper, further into endocrinology or hormones.
Because if you're a woman navigating perimenopause or maybe you're postpartum, maybe you're just in the luteal phase about to get your period, or maybe you're a mom and you're watching this play out in your young daughter who's going through puberty, I need you to understand your hormones. They're radically shifting the way your brain is processing your thoughts.
There is a powerful, intimate dance between estrogen and dopamine. Estrogen acts as a master key in the female brain. It directly supports the synthesis and signaling of dopamine, which is the exact neurotransmitter responsible for focus, impulse control, working memory, emotional regulation. When your estrogen levels are steady or even high, your dopamine system functions smoothly.
It's easier to prioritize [00:14:00] thoughts, put worries in a box, and tell your brain, "We will handle that tomorrow." But when estrogen begins to fluctuate wildly, or it's permanently dropping, or it's, you know, being challenged by progesterone, your dopamine levels, they're gonna take a massive hit, as are your serotonin levels, your acetylcholine levels, and we can even see histamine being affected.
For a woman with a neurodivergent or a hormone-sensitive brain, this drop can feel like the ground is shifting under her feet, or maybe the ground just like just bottomed out below her Suddenly, the internal scaffolding you built over decades to keep your life together, it starts to crack. The sticky notes don't work anymore.
The digital calendars start to fail. Your working memory gets foggy. Your ability to filter out irrelevant background thoughts and noise, it completely erodes. You're becoming more sensitive to the environment. This is exactly the picture that so many perimenopausal [00:15:00] women describe. And what do most women do when this hormonal shift occurs?
They blame themselves. They say, "I used to be so organized. Now I'm completely scattered. I must be losing my edge. Like, what's wrong with me? Am I just getting old? Is this the way life is always going to be?" But what if this isn't you falling apart? What if this is your body simply asking for a completely new level of biological support?
I mentioned estrogen, but progesterone plays a massive role here too. Progesterone metabolizes into a compound called allopregnanolone, which crosses the blood-brain barrier and binds directly to GABA receptors. GABA is your brain's natural built-in Valium. It's the chemical that creates a sense of deep physiological calm.
When progesterone drops in your thirties, forties, you start to lose the biological buffer. When you combine a drop in your brain's natural calming [00:16:00] agent with a drop in your dopamine, your midnight brain isn't being difficult, and you're not being dramatic about this problem either. Your brain is responding to a shifting chemical environment, and this shifting chemical environment is not a character flaw, okay?
This is the explanation of what is happening, and explanations are incredibly liberating because they prove your brain is not the enemy, your hormones are not the enemy, and you are not the problem. So my brilliant friend, let's talk about the ultimate reframe I want you to carry with you into bed tonight. You are not bad at resting. You're not bad at leisure time. You're not bad at turning off. You are simply a person who has been rewarded for a very long time for staying on high alert. Your brain is not broken or dysfunctional.
It has been fiercely, loyally trying to protect you and keep your entire world spinning day after day.
What if what you've been calling [00:17:00] overthinking is actually just a beautiful but tired nervous system that has temporarily forgotten what safety feels like? The goal here isn't to bully your mind into absolute silence. It isn't about mastering the perfect meditation technique or scolding yourself when thoughts pop up.
The goal is to gently show your brain that it's allowed to step down from its post, take some time off. The next time you're lying awake and the thoughts start rushing in like a tidal wave, as they do, I want you to take your hand, place it on your heart, and ask a few compassionate questions to yourself.
What is my brain working so incredibly hard to protect me from right now? What heavy responsibility am I still carrying under the covers with me? Is it safe for me to let go of the world for the next seven, eight, nine hours? Real rest is not just about closing your physical eyes.
True rest only [00:18:00] happens when your nervous system feels completely held, when it knows deep in its marrow that the universe will not fracture into pieces if you stop managing it until tomorrow morning. You are allowed to be a human being. Okay, that just needs to be said. You are allowed to be a human being, not just an operating system that keeps everyone else functioning
And if you do need deeper support, I do have other episodes with protocols to help you get the sleep you desire. But today, if you listened to this and recognized yourself in the biology, the cortisol, the ADHD traits, I want you to celebrate that realization. You just cracked the code on something you've been blaming yourself for years on.
That's a massive accomplishment. You do not have to earn your right to rest by completing your to-do list perfectly. You do not have to carry the weight of the entire world alone inside your head. Tonight, if your mind starts racing, don't meet it with [00:19:00] hatred or frustration. Meet it with curiosity. Remind that sweet, protective brain that the watch is over, it's time to go to bed, and that it's finally safe to step down.
Until next time, please take care of yourself the way that you're taking care of everyone else. You have earned that peace. As always, it is an honor to be here with you week after week sharing this time together, and I will see you next time