I don't know if this is specifically related to BPD or not but I always have felt the need to know unsolved answers. My brain will keep shifting from every possible scenario in my head over and over. I'll keep being convinced I finally have the right answer to whatever it is, big or small, that I'm fixated on based on my emotional response. I even get breakthroughs on my own all the time but it just recycles again and again no matter how much clarity I can find. Such huge emotions will be involved over such little and meaningless questions. Let alone if it's something that actually matters, then I can never let it go and always wonder. 