Read this. Published September of this year. Researchers created vulvodynia in mice by repeatedly giving them yeast infections and curing them.
This is what's causing my vulvodynia. This has been my instinct all along. I had two bladder infections in the six months prior to vulvodynia and countless others before that. I never had recurrent yeast infections, but I think the principle holds: recurrent infection leads to inflammation which leads to chronic pain.
My cooch is still stinging, literally, from infections long gone. This is probably why eating well helps, and why treatments involving the immune system are successful at reducing or eradicating pelvic pain.
P.S. I'm keeping up the two lame posts before this one for context. It all started when I read this post about how prolotherapy (a treatment involving the immune system) is making a fellow v-girl's pain go away. First I flipped out about having to add yet another treatment to my list. Then I got mad at chocolate. Then I posted in a vulvodynia Facebook group and ranted in an email to a vulvodynia penpal. Then I decided to try the probiotic yeast reader Hannah says helped her. Then I googled "saccharomyces vulvodynia." Bing. O.