Hi I'm Mary, and I live in the US. I have had thyroid problems since I went through menopause at age 51, I am now 68. I live in Colorado which is a mile above sea level. This year I spent 4 months in Florida. Since coming home I'm incredibly tired all the time. I take Synthroid 100 mg and 5 mg of liothyrinne. About 2 in the afternoon I take another liothyrinne. If I don't I get very cold and tired. My blood work says I'm normal, but I feel terrible. I currently decided not to eat wheat. I'm on a low carb diet anyway. The only thing I drink is water, coffee and tea with cream. I was drinking beer, but can't because of the gluten. Any other alcoholic drink seems to make me more tired. I have Hasi, and b12 deficiency. Do you think I should take iodine? I had a pace maker put in 5 years ago because my heart beat was only 34 bmp. I have gained about 15 pounds in the last year, and yes I am cold all the time. The Endocrinologist I've seen in the past have not been much help. Anybody have any ideas?