Hi. I hope you get to feeling better soon. I'm glad that your dr is ordering some good testing for you and seems to be doing his best to get you some answers and feeling better. The MRE that he ordered for you is a great test, a very advanced way to look at our GI tract, which can often be very difficult to image.
I work in radiology and I think imaging is great for dx of disease, etc. That said...no imaging study is perfect. No radiologist reading those studies is perfect. You can put a lot of faith into imaging testing, but not all. In my own experience, 2 months ago, I was recovering from giardia (intestinal parasite), GI ordered a CT of the abd/pelvis to see if GI symptoms were related only to that, and not a flare. CT showed some imflammation only around my ostomy site. Nothing very concerning at all. A couple weeks later, I was in the hospital. Had a colonoscopy and upper endoscopy and found extensive severe disease in the colon and moderate disease in the duodenum. All unseen on the CT scan.
I guess, what I'm saying is that imaging --especially of the GI tract -- should never replace what you feel your intuition is telling you. Surgery is not always the answer, and it won't cure crohn's, but it is also not something to be afraid of. I'm glad you seem to be surrounding yourself with good dr's. If you do have to have surgery, please carefully research your surgeon. If possible, ask a few of the nurses in the GI office who they would want. Other good resources could be people that assist in surgery recovery, such as ostomy care nurses (WOC's- if that's what you're having) or nutritionists that care for people that have had resections.
Hope you feel better soon!