Hi Kelly.
The RAI does most of its damage to your thyroid in the first few days, before it all leaves your body. However, usually the thyroid doesn’t actually die enough to alleviate hyper symptoms for six weeks-six months, depending on the RAI dose you got and other factors. It could be a long time yet before yours stops dying–so yes, there’s lots of reason to think your treatment worked. With my dose of 10 millicuries, it took over three months before I went hypo, which I think is fairly average. Hopefully that encourages you. Do you know your RAI dose?
Dianne N