Hi, I had gone through your question and understand your concerns. It may be rectovaginal fistula. A fistula that has formed in the wall of the vagina is called a vaginal fistula. A vaginal fistula that opens into the rectum is called a rectovaginal fistula. causes a vaginal fistula: Surgery of the back wall of the vagina, the perineum, anus, or rectum. Open hysterectomy is linked to most vesicovaginal tract fistulas. Radiation treatment for pelvic cancer. A period of inflammatory bowel disease (including Crohn s disease and ulcerative colitis) or diverticulitis. A deep tear in the perineum or an infected episiotomy after childbirth. If you have a rectovaginal, colovaginal, or enterovaginal fistula, you most likely have foul-smelling discharge or gas coming from your vagina. After fistula repair surgery, be sure to follow your doctor s instructions. See your doctor right away if you have signs of infection, such as a fever, tenderness, swelling, or redness.