I have BP2 with OCD and GAD. My pdoc says that it's common to have anxiety disorders with BP2.
I dealt with my OCD in 1981 in what may seem a strange way. All my life I tried really hard to be perfect so that people would love me. I got straight A's to please my parents. I married the man they chose. When he turned out to be emotionally abusive, I tried to be the perfect little wife and mother. My house was spotless, there were no toys on the floor when he got home from work, I cooked his favorite meals and not the food I liked, etc.
In 1981, I separated from him (for 6 months only) and went to a woman's shelter in a nearby city. After 6 weeks in the shelter, I got my own apartment. At the time my kids were 1 and 3 years old.
During the time I was in this city I went to a "TA" (Transactional Analysis - I'm OK, You're OK) weekend minithon. Remember that this was the early 80's and pop psychology was popular. During that weekend I was able to let go of being perfect and my OCD decreased dramatically. I now have mild OCD, nothing like I had when I was young. (I'm 59).
Self help books and seminars sometimes do work. I don't know why, I just know it helped me.