Celiac's Disease and Colitis diet?

So for the past year I've been on off and on diets, trying to get to a goal weight of about 140lbs or so, May of 2014 I weighed my highest at 205lbs. Today I weigh 160lbs.
With that short back story I get to my question/post, 2 weeks ago I developed a terrible gnawing, burning, rolling, stabbing and dull at the same time excruciating pain in my upper and left side of my stomach. Accompanied with nausea, terrible bloating, complete loss of appetite (you couldn't have forced me to eat) and as TMI as it may be, diarrhea. I waited about 2-3 days, as it wasn't too bad at first but kept getting worse, that Monday I couldn't take it, went to my doctor and they immediately sent me to the Emergency Room labeled Appendicitis. After high doses of pain medication because I was crying and dry heaving too much to talk, and a CT scan and blood tests, my appendix and gallbladder are fine, but I had a severe case of Colitis, which is inflammation of the intestines (that can actually be a number of different things).

They put me on antibiotics, steroids and gave me pain meds to last a week. The first few days I didn't eat anything, I couldn't and I wouldn't. Then once the steroids started working, I got hungry. I got really hungry, every day that passed I wanted to eat a little more. The only thing I could eat though was applesauce, bananas, and pudding. Even those 3 bland items made my stomach twist and burn and it left my system within 2 hours or so anyway. Any type of new food that I would try to eat was like entering hell all over again. Now, in the past few months, before all this, I learned that gluten/bread does bother my stomach, it makes me bloated and makes me ache and feel terrible, I went off of it completely for a few weeks the beginning of the year and felt much better, but I slipped back a bit. The beginning of this month I went on a week long trip, and m entire diet was pretty much crap like donuts/fried foods and etc. And barely 1 week after that, this all happened. Which is why we are all pretty sure it's Celiac's.

It'll be 2 weeks this Monday, I feel better, but I still can barely eat. It doesn't matter what food I eat, anything new hurts my stomach. So I am reluctant to eat, but I'm becoming light headed and weak now, I'm starving and pretty sure I'm malnourished and dehydrated. I'm craving meat though, as weird as it is, the only thing I want to eat is meat. Red meat, steak/pork/etc. I want it so bad I can barely stand it, but I can't eat it. I've never craved meat like that before, so I'm not sure what that could pertain to. My question in this is, for those of you that have had issues with colitis/celiacs or something similar, what did you eat? Any recommendations?
I'm seeing a gastroenterologist about all this on Monday, but I figured I would ask on here to see who else has dealt with something like this. So far I've lost 12lbs since I have been sick (less than 2 weeks). But I don't feel good, I feel run down and like even going to the store and walking around makes me exhausted. This definitely isn't how I wanted to lose the rest of my weight.. but I was hoping maybe you guys could help lend a guiding hand. Sorry for the long post, I find it better for people to know the situation before giving advice.