So sorry that you have joined the dreaded fistula club. I had a RV fistula that reared it's ugly head about a year ago. I had a healthy, happy pouch for 10 years prior to this occurrence. It started with gas and progressed to stool. It was never extremely heavy, but irritating enough for me to have more surgery. The entire area was completely irritated and raw from the passage of stool. It was NOT fun. I could not even imagine having marital relations, which was one of the deciding factors for having the repair.
I am now 2 months post-op, doing well, and keeping my fingers crossed that this will be the end of it.
Good luck. If you would like more details, I would be happy to share the long version. Just shoot me a PM.
Best of luck!!