Let me guess what brought you here.
You've been googling your symptoms at 2 AM. The chest pain. The heart palpitations. The fact that you haven't slept more than three hours in a row in weeks. The brain fog so thick you walked into a room and forgot not just why you were there, but where you were. The nausea that hits every time you try to eat. The hair falling out in the shower. The weight you're losing or gaining that makes no sense given what you're eating.
And somewhere in that googling, a small, terrified voice in the back of your head asked: am I losing my mind?
You are not losing your mind. You are experiencing the well-documented physiological aftermath of a catastrophic attachment injury. And I need you to understand exactly what is happening in your body right now — because naming it is the first step to surviving it.
What Your Brain Is Doing
When you discovered the affair, your brain interpreted the information as a survival-level threat. Not a relationship problem. Not an emotional setback. A threat to your survival.
This is not an exaggeration. The person your nervous system had identified as your primary source of safety — the attachment figure your brain relied on for co-regulation — became the source of danger. The same brain regions that would activate if you were in a car accident activated when you read those texts or heard those words.
Specifically, your amygdala — the brain's alarm system — fired a distress signal to your hypothalamus, which activated your HPA axis, which flooded your bloodstream with cortisol and adrenaline. This is the fight-or-flight response, and in betrayal trauma, it does not turn off. It stays on. For days. For weeks. Sometimes for months.
Meanwhile, your prefrontal cortex — the part of your brain that handles reasoning, planning, and rational thought — went partially offline. Blood flow was redirected away from higher-order thinking and toward the survival centers. This is why you can't concentrate. Why you read the same email four times and retain nothing. Why you left your keys in the refrigerator.
Your brain is not broken. It is triaging. And it has decided, correctly, that survival is more important than your Tuesday meeting.
A Symptom-by-Symptom Guide to What's Happening
The Insomnia (or Hypersomnia)
Your nervous system is in a state of hyperarousal — chronic, sustained threat detection. The cortisol that should drop at night to allow sleep is not dropping. Your body is standing guard. It is scanning for danger even when you close your eyes.
For some women, the opposite happens: the nervous system shifts into dorsal vagal shutdown — the "freeze" response — and the body conserves energy by making you sleep excessively, even though you wake up more exhausted than when you went to bed.
Both responses are biologically normal. Neither means you are weak.
The Chest Pain and Heart Palpitations
The sensation of a hole in your chest, of your heart racing for no apparent reason, of sudden sharp pains — these are the result of your sympathetic nervous system running at full throttle. Your heart rate is elevated. Your blood pressure may be higher than normal. Some women develop cardiac arrhythmias from sustained stress.
If the chest pain is severe or persistent, see a doctor. Tell them you are under extreme emotional stress. Do not minimize what is happening to your body.
The Inability to Eat (or the Compulsive Eating)
Cortisol disrupts the gut-brain axis. Your stomach is receiving the signal that you are in danger, and digestion is not a priority during danger. The nausea, the loss of appetite, the sensation of a pit in your stomach — these are your gut responding to the same alarm that is driving everything else.
Some women go the other direction: the nervous system seeks comfort through food as a form of self-soothing, leading to compulsive eating that feels equally out of control.
The Brain Fog
This is prefrontal cortex suppression. Your brain has deprioritized executive function in favor of threat detection. The fogginess, the inability to follow conversations, the sentences you start and can’t finish, the feeling that you are observing your life from behind glass — this is dissociation and cognitive impairment caused by sustained neurological crisis.
It is temporary. It does not mean you are stupid. It means your brain is working extremely hard on something that is not the task in front of you.
The Shaking, the Skin Sensations, the Temperature Swings
Trembling, a feeling that your skin is on fire, sudden chills or hot flashes — these are autonomic nervous system dysregulation. Your body’s thermostat and tension regulation have been overridden by the stress response.
Survivors describe this as feeling like their body has been taken over. That is neurologically accurate. It has — temporarily — been taken over by your survival system.
The Intrusive Thoughts and Mental Movies
The images that play on a loop — of them together, of the texts, of the moments you now see differently — are not something you are choosing to think about. They are your hippocampus attempting to process and file a traumatic memory. The hippocampus has failed to “time-stamp“ the event, so your brain keeps replaying it as if it is happening now. Right now. Over and over.
This is the same mechanism that produces flashbacks in combat veterans. It is not drama. It is neurobiology.
What This Means for You Right Now
It means you are not broken. You are not weak. You are not going crazy. You are not overreacting.
You are having a documented, biological, neurological response to a devastating injury. The same brain and body systems that would respond to a car accident or a physical assault are responding to this. And they are responding correctly.
Naming it matters because shame thrives in the unnamed. When you understand that the brain fog is prefrontal cortex suppression and not a personal failing, when you understand that the insomnia is cortisol-driven and not a character flaw, you can stop fighting yourself and start working with your biology.
You are not going crazy. You are going through something that would make any human body react exactly the way yours is reacting.
For practical strategies on managing the eating, sleeping, and functioning dimensions of this crisis, read Eating, Sleeping, Functioning: Surviving the Physical Crisis of Betrayal.
Related reading: - Hub: The Complete 90-Day Survival Guide After D-Day - Spoke 6: Eating, Sleeping, Functioning — Surviving the Physical Crisis of Betrayal
— Sarah
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