If your own doctor can't do anything, may I suggest your try to get her in to see the Berman Sisters as a last ditch effort if nothing else. Here is there website: Berman Sisters
If anyone can solve a female problem with pain and sex, these ladies might be it. Here is the bio from their site: Laura Berman, Ph.D., a psychologist and sex therapist, and her sister, Jennifer Berman, M.D., one of the few female urologists in the country. I have seen them on TV before, they are gung-ho about fixing female dysfunction.