look at your diet as this can effect your thyroid
rice,sweetcorn,onions,eggs,leeks to name but a few all contain iodine
also any medicines, creams (antiseptic), mouthwashes,bandages, dressings can all effect your levels
try and get a book or look on web for relavent information
you may be able to manage your thyroid better through your diet
i had graves disease and was treated with radioiodine therapy i now just keep an eye on my diet as i was underactive for a while the medication i was put on made me overactive and it was the smallest dose so i stopped my medication and balanced it out with my diet