For recurrent UTI you should start homeopathic treatment which serves safe.
Regarding RVF what is the size and position if fistula.also the cause need to be ruled out.
Also start homepathic treatment for fistula till cause is found out and till surgery is planned.
If you go for surgery,to avoid recurrence and post operative complications, homeopathy is very effective.
Next Steps
get it examined by surgeon and give proper details of RVF and your present symptoms.
on basis of that I could suggest homeopathic medicines and home made remedies for relief.
Health Tips
Eat fibre rich food for easy digestion and to avoid gastric disturbances.