Do you feel like you are not doing the right thing? I don’t know anything about kids and Graves but my son (he is 3, too) has congenital hypothyroidism and it is hard to make decisions like that knowing that is could affect them later on down the road. I trust his ped endo (they are so hard to come by) but in the beginning I went to our local children’s hospital to get a 2nd opinion and felt way better about our endo’s course of treatment. Just a thought.
Being the parent is difficult. I hope you get some peace about your decision, trust your gut as a mom. Usually it steers you in the right direction. You will get past this and move forward no matter what you chose.