I sometimes can’t stop ruminating either. It’ll be about something that happens then I won’t be able to accept. If I am alone I may talk about it or even shout at the person who is not really there. I am usually working on some thing at the same time.
I associate this process with anger. I can sometimes accept the thoughts as a sign to talk it through with the person, which usually goes well actually.
I sometimes can’t stop however and in hindsight I am being irrational, energy level is through the roof which may compromise sleep and my ability to work. I may end up miss placing items as I walk around lost in the rumination, forgetting what I’m doing.
I have gotten better in recent years with this however. It is vital to stop at dead in its tracks if I can because obviously about 27 comorbid symptoms, illnesses and disorders seem to rear their heads in that cycle.
Honestly , if I were ever caught doing it and somebody walked in the room they would believe they were witnessing somebody insane and they would be right!
if I am lucky and I can’t stop, I will shut down and go into thousand yard stare mode and that will stop me.
Ideally though, I will acknowledge my need to meditate and stop the process. It’s not easy. None of this is easy.