I have a recto-vaginal fistula, so I have constant leakage from my vagina- blood, mucous, fecal matter, etc. It's not heavy, but I do have to wear a pad daily. The leakage is worse when the UC is acting up, & I'm going to the bathroom a lot. It's more of an annoyance than anything- because the fistula is located right outside the vaginal
opening, it's not really "in there"- there's no worries about
vaginal infections or anything. Apparently these are some of the worst types to surgically close, because the typical fisulotomy is where they lay
open the fistula track & let it heal from the inside out. This always involves cutting thru muscle, which they don't like to do as it can lead to incontinence. I've got enough of that right now, thanks.... A colonoscopy most likely won't show a fistula- you'd have to tell your GI your suspicions, then follow-up with your gyn or a surgeon. And more testing, pelvic MRI's, CT scans, etc.