This is a patient-to-patient website. While there has been a surgeon posting to some, I do not know how often he checks. Best advise you are going to get is go see a doctor. You gave a very limited amount of information and no one, even a doctor can diagnose you over the computer.
HI I agree with Christine, you should really get in to see a dr. It sounds like whatever it is, is progressing quickly, and you want to put a stop to that. If you are thinking it is thyroid, I would just be apt to think not, usually those sorts of things are followed by some symptoms of some sort. I'm not a dr, just my opinion, you need to get in and see one, and find out what's going on, Good luck.