@JoeyLiz Hoping you are starting to recover after your horrible sickness. How frightening for you. At least the nasties have been ruled out! I have had an overactive thyroid for around 20 yrs & have been on medication for that time. it was only discovered a couple of years ago that this med was quite toxic & i should only have been on it for around 6 months. It can effect my bones, liver & goodness knows what else but after my Graves disease had come back again only recently, it was decided for me to take a radioactive iodine tablet to "blast" my thyroid back into normality & now i am just on a safe drug forever to regulate it. I asked if my cancer or rad treatment may have caused it to come back at this time but the endo didnt seem to think that there was a link....but who knows!! Anyway, i do hope they get to the bottom of it. I am having regular blood tests like you, to ensure things stay on track. Good luck xx