I am a 16 year old female who has been on different thyroid medic...

I am a 16 year old female who has been on different thyroid medication for at least 3 years. Along with my thyroid disease I have type 1 diabetes also. Right now I am taking LEVOTHYROXINE. I have taken levoxyl, synthroid, and I cant remember any others. Over the years I have gradually increased my dose to 125 mcg. Instead of losing weight with these medications, I've actually gained 25 lbs, and Ive kept my slow metabolism. Ive experienced bloating, gas, fatigue, spaceiness-like out of it, unable to concentrate, increased appetite, and mild depression. I usaully am able to get fantastic grades, and catching on to things comes easy. But now ive lost interest in friends, sports and overall life. I am wondering if this thyroid medication or my other medication- Metformin has anything to do with how I feel or overeating?