... to go through radiation. since then i've been dealing with hypothyroidism and i'm not sure how to deal with it. i've had lots of lab tests done and im now on 112 mcg of synthroid. i'm very confused.. some days i feel perfectly fine, but most of the time i'm constantly freezing, no matter how closely i watch what i eat, i still gain weight. i'm always exhausted with very little energy and very depressed. i'm only 20 yrs old.. will it always be like this?