Hello! Hoping someone can help me with some advice...I am hypo with 2 lesions shown on scan, one fluid filled cyst, one calcified. I had a Ross procedure heart valve repair in 01, which means because I used my own pulmonary and a donor valve, I have to take no medications for this, like coumadin. Everything is fine from that standpoint. However, all this cropped up with my Thyroid 6 months ago, with the calcified nodule just being found last week. I was started on Synthroid in the beginning, and slowly moved up to the point where I felt great, at .75 mg. However, after 2 weeks at that dose, I started to have heart palps, racing heartbeat, shortness of breath. The doctor took me off for a rest. And, the side effects from Synthroid, My God, were horrible for me getting to that 2 week feeling almost normal point. My Family Doctor now wants me to try Armour, 1/4 gram, and cut it in half till I see how I react. My Endocrinologist looked like she would explode when I asked about Armour when all this started 6 months ago, so I will find another Endo. Any advice out there? I would like to try Armour, but if I'm sensitive to Synthroid, will I be the same on Armour? I'm 42 and have 4 kids at home, and a move in two weeks, and a prescription waiting at the pharmacy.....My TSH right now is 3.52, T3 is normal. Thanks for your help.