Re Hashimoto, of course there is something you can do for it. First, you need to see an endocrinologist. I have Hashimoto’s and it’s an autoimmune form of hypothyroidism. After bloodwork is done, you are started on thyroid medication. Small doses at a time with your T4 and TSH levels being tested roughly every 6 months until you are at a stable level. You will stop gaining weight, however it is up to you to lose the weight you have already gained. As to the diarrhea and cramping immediately after eating, please see a gastroenterologist. I have microscopic colitis and when it comes out of remission, that is what happens to me. However, there are many other causes as well, but a GI would be the best person to diagnose this problem.