First of all, you can't afford to "go insane". It must be difficult at times, but you're her mother; you have to be patient and stay strong for your daughter. Secondly, try not getting upset at your daughter when she's having trouble with OCD. You mentioned that the same topic, your daughter's obsession about her relationship with men, is discussed repeatedly. It is very important that you do not feed her obsession by talking about it over and over again. Your daughter is obsessing and ritualizing by thinking and talking about her relationship with men. I don't mean to be rude, but the reality is that she's getting caught up in the BS caused by OCD. In the end, your daughter may have an issue with men, but if what you write is true, OCD is blowing it way out of proportion.
I highly recommend that you or your daughter buy this book:
"Brain Lock: Free Yourself from Obsessive-Compulsive Behavior" by Jeffrey M. Schwartz, M.D. with Beverly Beyette.
When you write that your daughter says that the OCD tells her something, this is a very good sign. It is very important for a person to separate himself/herself from OCD. It is also my opinion that no psychologist is better than a bad psychologist. If your daughter does not feel comfortable discussing things with someone, or if she feels things aren't progressing, she should not waste her money on that person. She must do what is best and what works for her.
Take care, and all the best!