Hmm, I don't understand: If you have UTIs, he must have found something, or not? Or do you mean bladder pain? That's something different, and quite a few 'fibromites' have it. I have pain before peeing and have to go often, but neither my urologist nor my nephrologist has found anything, which means it's a muscle problem.
In case you're interested: I'm managing to decrease the pain by sitting bent strongly forward. And the frequency a lot by drinking only soy drink and only little watery stuff, and a little by not drinking quite as much, which the nephrologist said is OK. My dryness has got better after a treatment from my acupressurist.