Three month ago I was diagnosed with hypothyroidism; I am currently on levothiroxin sodium 25 mg a day. I was feeling great, better than ever, I honestly felt better. But now three months after I go to the scale and I gained 25 pound! As you can imagine I am going nuts, I cant believe this happened to me I eat healthy and work out 6 time a week, and all of my clothes fit the same in fact I feel like they fit better. I have always dealt with extra pounds but kept it under control. But this tome is unexplainable. I also lost 9% body fat and I am constantly cold. The last time I weighted my self was a month from today feb 28 and I was 167 yesterday I was 185. I think I would have noticed the weight gain. I am currently con a 1200 cal diet and working out. Can you please help me explain this. I ma so sad I