I have an overactive thyroid. My T4 counts are off the charts 1800. This didn't happen until I had a cath scan of my heart using iodine. I am highly allergic to it. I have gone into anifalaytic shock before. Could this of caused my thyroid to go crazy. The medicine I am on PTP makes me very ill. Drs say they can't do anything until my counts go down SOMEONE PLEASE HELP