I was diagnosed hypo over a year ago, still got hypo symptoms, taking 50mcg eltroxin daily. Now got sinus tachycardia and t wave abnormality showing on ecg when I complained of my heart pounding. Resting pulse is regularly over 100, often 120-140. Could I be under or over medicated? Should I be concerned - Dr says it's normal but given his track record normal is the word he uses for everything!