I am sorry to hear about your diagnosis of ovarian cancer. I trust that all of the disease has been resected.. One of the risk factors for vaginal prolapse is hysterectomy. Vaginal prolapse can often lead to a falling or drooping of the bladder, because the bladder is normally held up by the front wall of the vagina. If the front wall of the vagina is falling, then the bladder can fall down behid it. Bladder pain can indeed be caused by the stents that you have in place, but also by spasm of the pelvic floor muscles, which is amenavle to rehabilitation by a pelvic floor physical therapist.