It's so great that you are fluent in hospitalese and were able to figure out what was the right path to take in the ER. Not many can manage that! A benefit of CP I suppose?
Entocort enemas sound completely wrong, I agree. Are you in the UK or other national health system? I wasn't aware that entocort enemas were available in the US.
Taken orally, entocort directly treats the TI. Used rectally, it will be an effective treatment of inflammation in the rectum and sigmoid colon. What kind of idiotic medical person gave you an enema for the TI?
So here's the thing about
your belly pain and your diet. There is nothing "stuck" in your TI. It is inflamed. Bulky foods like whole grains, raw veggies, etc. are not going to be able to get through the inflamed passage very easily. If you eat too much of something like that, you could end up obstructed and in the worst case perforate your bowel. So stick to low residue foods; you can even take foods you like and puree them if you can stand the different texture. You can pile on the calories if the foods are tolerable - ice cream, avocado, cream cheese on a white bagel....you get the picture.
Oh, and don't take any NSAIDs for any pain you're having. Those meds are a high risk for folks with inflammatory bowel disease.
My experience with low iron was similar to yours - I have been chronically anemic since my mid 20s, but only diagnosed with IBD when I was 39. For all those years I heard the iron issue blamed on my menstrual cycles, my vegetarian diet, blah blah blah. Now the low iron makes much more sense. I find iron supplements difficult to take, though I will do it if I have to. I took iron for about 6 months a few years ago to get my ferritin back up to normal. My hemoglobin was 12.3 in '10, 11.8 in '11 and 11-ish now. So creeping down again, but nothing like 4. O.M.G. No wonder you're fatigued. It might be worth a call to see if you can get transfused. 4 is really, really low.