Cooper, I'm sorry to hear that. The Promethius test is really unreliable, but biopsies are usually conclusive. As others have said, even though the diagnosis was wrong, the treatment was still appropriate because UC and Crohn's colitis are treated in very similar ways.
Regardless of your diagnosis, I hope you're soon in remission and feeling better.
This is what I don't understand.... I had biopsies done but my doctor said it showed IBD, and Crohns/Colitis. He is not sure which one yet, but thinks it is UC. What should the biopsies have showed him for him to know for sure which one it is?