I have had hashimoto's for three years and I have been progressively feeling worse. One thing that I have just found out is that T4 can be misformed into reverse T3 instead of T3. This is common with autoimmune diseases from increased cortisol and stress. You need to get a specific RT3 Test to see what your levels are. Also, decreasing your T4 and slowly increasing slow release T3 is very helpful. Some test show a immune response in the gut with mercury toxicity and leaking gut syndrome which causes a decrease in digestion. It may be helpful that your doctor prescribe Creon (pancrease) which assists digestion and will decrease the immune response which drives the cortisol.