I was diagnosed with IBD, mainly in the rectum where all the inflammation was. Then when they did the biopsies, they found inflamed areas in my left colon but not on camera. They don't know yet whether it is Crohns or UC. What are the main differences. I get cramps and a little pain in my left side but also around my navel, they are shooting pains, plus my stomach bloats out alot. Could this be Crohns?