Incest Survivors Support Group
Incest refers to any sexual activity between closely related persons that is illegal or socially taboo. Consensual adult incest is very rare. Incest between adults and prepubescent or adolescent children is a form of child sexual abuse that has been shown to be one of the most extreme forms of childhood trauma. If you or a loved one is a survivor of incest, join the group...

It could be that you are experiencing the backlash of memories or processing. I would sit and think for hours, just staring off into space. My mind was racing. Eventually it stopped, thank goodness. For me, the key was allowing myself to think whatever my brain wanted to. Total freedom.
I think you nailed it with this "my brain doesn't really give me a choice."
Get as much rest as possible and practice lots of self care.
So have I. Some of them took themselves away from me. My three husbands. My three children who are the sociopathic children of a sociopath. Some of them I discarded because I finally realized that they were bad for me.
But I am so fragile. My first inclination was to stay alone, to never venture to give my heart again. But now I am in a relationship with a good man. But it is so hard. I create drama because I expect loss. Sometimes I think I'm trying to get him to reject me because, after all, they all reject me in the end. Why not get it over with?