I think some work on your mom may be a good idea. just reading your post I see red flags of undealt with issues. you quit therapy because you started talking about your mom. I sense a lot a anger and resentment toward your mom. I believe ocd is about having control in your life, something you didn't have because of your mom. I get not wanting to deal with a bad parent, I disowned my own. he was the source of my trauma. as yours is. but I confronted him about it when I did so. I spoke my piece. I think you need to at least deal with your feelings of anger and let go to fully let go of your mother. my father doesn't trigger me anymore. you need to get to that point with your mom.