Derry-boy - YOU CAN DO IT !!!!! It IS awful that you have to have a surgery again :( :( :(
BUT try to look at it this way - they know what it is and how to fix it and it WILL BE FIXED

!!!!! Couple of more weeks of butt-soaks and you will be free of all of that misery !!!!
It is worst when they say "it is nothing" and than person suffers for many more months even years and than somebody finally finds out "Oh - it is a fistula forming"

!!!!
Try to concentrate on the fact that they discovered it on time

and will clean it up and than you can finally be on the way of complete healing !!!!
What is their theory - why did it form ??? Is it on the same place it was before ????!!
Wishing you the best of luck , Derry - all will be fine - you will see !!!!
PS: Did they ever checked you for Crohn's ??? Tried Flagyl antibiotic ever ???