2AM brain.
Mine does that too - not nearly as much as it used to, but sometimes.
I don't have a solution for it, but I am just empathizing. I read somewhere that darkness is when the human brain makes up the most scary stories. Makes sense, fear of the dark and the boogey man and tigers is pretty primal. Sometimes I just turn on the light and that's enough to settle down.
If I think of that...