HI DOCTOR, my tsh came out at 6.25, I am taking syntroid 0.75, and I feel very tired. I am a 55 year old woman and my thyroid was burned with radioactive medicine. My cholesterol and tryglicerides are a little high too, I was thinking that maybe it's the lack of hormones. Also, I don't sleep well and I am moody, which do you think is the right dose for me, I am 5'4 and weigh 122 pounds. My doctor in Mexico is not a specialist and is new to syntroid. I would really appreciate your advice. Thank you!