Synthroid and migranes

I have read a lot of these blogs and I am seeing that many other people have the same side effects. I was diagnosed with hypothyroidism when I was in 6th or 7th grade I think and I am now a high school senior so about 5 years taking Synthroid. the doctors said that my antibodies had completely destroyed my thyroid gland so I wasn't getting any of the hormones I needed which became very noticeable when I started gaining weight and loosing energy in 5th grade. I haven't really seen any weight gain in a while but I still look like I am overweight. I am 5'6 and 130 lbs so I am about average. Side effects that are also occurring are rapid mood changes, one minute I am happy and something sad happens or I think about something and ill be tearing up. I feel depressed a lot. I am currently on 150 mcg. also during 9th and 10th grade I was put on this drug to stop my puberty so that I could grow more while on the Synthroid I guess it helped a little with height but I still look like a freshman. I don't know if I should stop taking it or keep taking it because I stopped for about a month once and started getting really sick, I would get really bad nose bleeds at random, had constant migraines and felt sick to my stomach. I started taking the Synthroid again and felt fine. I really don't know what to do.