Coping with Hypervigilance After a Flashback


I need help coping right now. I had a flashback during the night, which prevented me from sleeping, and now I cannot for the life of me relax. My entire body is so tense that it feels like stone, I'm anxious as hell, and I can only see danger no matter where I look. It has been like this all day, and now I feel numb. I'm guessing that this is hypervigilance, but I don't know what to do about it, and it feels like waiting it out is not an option.
My best tricks to deal with the sudden flood (and prolonged effects) of adrenaline/cortisol/all the things swirling around in my blood are to…

- Go burn them off / put them to use (sympathetic nervous system = fight or flight… but lower grade use, like exercise, sport, dancing, walking, etc. will still burn off all the chemicals in my blood stream).

- Hot shower to sluice all the sweat & fight/flight pheromones off

- Food to lean even harder into the parasympathetic nervous system (rest & digest)

- Sleep

…In that order.