Diet matters, gut bacteria is responsible for almost all diseases including cancers and autoimmune which include things like MS, diabetes, and many other problems. This is just now getting the attention in the medical community but still doctors haven't been trained on how to deal with this other than meds and surgery. I also regret my surgery which was very expensive. I was tested at Mayo for FM and Lactose intolerances and it was negative. After the surgery I was still unable to get off meds until I read Fast Tract
digestion. I thought fruit was good for me and love fruit especially since that's the only sweet things I had. I had cut out all wheat products and sugars years ago. Once I stopped fruit it only took a day to feel better, it ferments in my upper intestine, can't digest it! Also have you been tested for Celiac? Most people that have it are thin, you said you had problems keeping weight on. That also causes all kinds of trauma in your body. You can try cutting out all carbs for a month. Yes it's tough to do but after a few weeks the cravings get better. Don't need the vegetables for awhile just eat proteins. Can have low fat proteins if fat bothers you just remember when buying meats to make sure they are antibiotic and hormone free or you'll continue to have problems. Heal your stomach. Dr Gundry just came out with a new pre and probiotic. Usually probiotics give me bad gas and don't need help in that department! None of this is easy but once you feel better it will be worth it!