A normal (max) TSH range is considered by doctors to be between 0.4 and 5.5. I have hypothyroid symptoms if my TSH numbers are above 2. With a thyroid stimulating hormone level of 3, my metabolism would be (has been) low enough that I had severe constipation, needed a starvation diet to control my weight, and had less energy. My last two doctors didn't believe me when I said I feel a lot better at a TSH of 1. My T3 and T4 numbers are normal even at 3 TSH so doctors tend to dismiss TSH. Irksome. I was finally able to nag my doctor to increase my synthroid. Regarding your abnormal GI results, did they look for microscopic collitis? I also have celiac disease so have your symptoms and more if I get glutened, but fine as long as I avoid the nasty wheat/rye/barley glutens. Consider an elimination diet and/or keeping a food log to see if you are sensitive to any foods. I also have to avoid NSAIDs and most legumes.