Fistula surgery fistulotomy

Had my fistula surgery today, painful as we speak, cant find comfort laying down, tomorrow will probably be the same, specially since i will be having a bowel movement, dam you fistula, how could a small tunnel create such a headache to deal with, and on top of that with all the technology advances we have made we should be able to have a better way on how to deal with a fistula