I have Graves Disease, I have been taking Methimazole since Febuary of this year. Two weeks ago my Endorinologist says my blood work shows that I am back to normal. Like overnight I have gained 30 pounds, well 2 weeks. I don t eat much, I have a sensible diet and excercise routinely, tennis 3 times a week, yoga. I am pretty active. My question is, am I changing to Hypothyroidism?