Trish, this is so upsetting. I think that you might also be interested in this discussion where @blinken faces similar issues:
- Has anyone had personal experience with rectovaginal fistula repair? https://connect.mayoclinic.org/discussion/has-anyone-had-personal-experience-with-recto-vaginal-fistula-repair/

Hello Trishana, I am in a very similar situation as yours. I had rectal prolapse repair in August which left me with fecal incontinence. I have an eventful medical history since then and began posting here as Blinken with Teresa mentoring me who suggested you read my posts. As of now, two rectal surgeons have been unable to find the fistula by EUA (exam under anesthesia) and Barium enema. My original general surgeon did identify it in September during the procedure for a 'temporary" colostomy intended to allow the previous surgery to heal and allow access to repair the fistula going forward. The surgery for the repair was cancelled by my insurance company's Utilization Review" as they deemed the scheduling too soon after the colostomy to allow a good outcome for me. Long story short, I began having rectal stool output within a couple weeks after the colostomy surgery but in the meantime, stopped having vaginal output. I now am scheduled with a colorectal specialist for takedown of my colostomy. I am worried that the fistula is still there, laying undetected like yours is and it will become a problem after this surgery. If it can't be found, it can't be fixed, and like you, my research shows that fistulas rarely heal by themselves.