Some of it does sound thyroid related. However, as you know, it can be tough to pinpoint the cause of symptoms, especailly in growing children. Diarrhea, hand tremors, inability to gain weight, intolerance to heat (feeling hot when others don't) are all symptoms usually associated with hyper. On the other hand, insomnia is usually associated with hyper...Molly's sleep pattern sounds almost more hypo. Fatigue is typical of both.