Just be aware that if you do have hypothyroidism, that it does feel good to know have an explaination for why you have been feeling the way you are, but don't ever use any disorder or illness as a crutch or excuse. Its not healthy, and I've tried to stay away from that. A lot of thyroid patients get a bad rap for using their thyroid problems as an excuse for being over weight or tired and stuff. While it is a valid explaination, don't use it as an excuse.
k, enough... Good luck on your blood work.