i have an overactive thyroid i started taking medicine and with in 1 month i gained 12 lbs my normal doc lowered the dose i was on, the specialist i went to see today don't see why he did and he told me the only way im gonna stop gaining weight is not eat as much i haven't been eating i eat a bowl of oatmeal in the morning then some dinner and im still hungry i fight it because im scared im gonna get fat. i have always been thin my whole life never had an issue like this. oh and my normal doc said my thyroid went underactive from my blood test but the specialist said its fine and he wants to give me the iodine treatment should i get a second opinion ???