Hello JHendrix,
I had a vaginal/j-pouch fistula diagnosed years ago. I didn't know enough about it and it also started with a Bartholin cyst. Please consider having your colo-rectal surgeon take a look at the situation. I also consulted my gynecologist at the start. She lanced the Bartholin cyst, and after that the fistula pathway completely opened and lots of future problems occurred. Let your colo-rectal surgeon handle it rather than your gynecologist.
Just my two cents from someone whose been there...
Caty