My doc always told me 6mp can cause pancreatitis so they tested me every few months. I started having pain in my upper left side and when they tested, I in fact had pancreatitis. The pain does radiate to your back and it's a grinding kind of pain but different from stomach. If you suspect you have it a simple blood test can answer the question pretty quickly.
There are so many other things that can cause abdominal pain. Gas pain from UC can get pretty bad. Good luck getting it figured out - hope you get some answers soon.
34 year old female, Diagnosed Ulcerative Colitis 5 years ago
Current Meds: Remicade every 6 weeks, Prevacid, Sustenex, Lialda, Lexapro (anxiety), Synthroid, Iron, vitamins, Fish Oil