My thyroid levels two months back was 5.8, i was taking 25mg Thyronorm then. My doc told me that even though the values were normal, he wanted the values to go bet 2 and 3 and increased the fosage from 25 to 50 mg. now all of a sudden for the last 3 weeks i have muscle aches in my wrists, and my left knee. Is it because of the meds? I am an active exercising adult and a Zumba instructor. I'm 40 yrs old. Please help.