pelvic pain and occasional pneumaturia

Hello, I had a complete hysterectomy in 2009 for ovarian cancer. Over the last year or so, I have had pelvic pain (constantly now) and have had mixed messages from health care providers as to the cause. One suggested a cystocele, while another said no sign of prolapse. Have seen many specialists all to no avail. Am currently awaiting another appointment with yet another pelvic physiotherapist. Urology has been unhelpful, and can only say that it is likely an over active bladder. But I don't think so, due to the pain involved. I also have lymphocytic colitis, but that seems to be in remission. Your thoughts or suggestions most welcome.