Not sure if this has been posted before, but I found this very interesting. It's an article from the Journal of the American Physical Therapy Association talking about psychological factors with pelvic pain. It - not surprisingly - found a link between pain and pain-related fear, anxiety and catastrophizing. I know we talk about that a lot on here, how fearing the pain makes it worse or brings it on. I found it validating that another source said the same thing.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3185223/
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3185223/