I believe my autoimmune thyroid issues were triggered by Lyme disease. After classic hypothyroid symptoms (on top of more classic neurological Lyme disease problems), I was finally diagnosed and prescribed Synthyroid, Eltroxin, and something else (T4 only). I was still not doing well, and my free T3 levels seemed to provide a clue. I did a bit of research and eventually found "Thyroid" by Erfa -- the Canadian equivalent to Armour. This certainly helped, but my autoimmune issues now make my TSH, free T3 and T4 results incomprehensible, so I'm finally being referred to an endocrinologist. I'm really hoping a reverse T3 test will be ordered, because it's just possible that I would do better on T3 alone. Since my TSH is so low, my FP is afraid of increasing my dosage of Thyroid to get my T3 into a high-normal range -- which is when I tend to feel better and my hair stops falling out. I'm glad to know I'm not the only one struggling with this. Any information I can gather before my appointment with the endocrinologist on Aug. 22nd will be to my benefit (and probably the doctor's annoyance). I've heard that endocrinologists are not very flexible and rely too heavily on blood test results -- but I guess it's easier to believe numbers than patients. Sad, but true.