In may 2012 I was wrongly told that my Thyroid had tipped into the underactive range, when, after doing some research , I realised it was totally normal. I have changed GPs by this time and although on 100mcg of Thyroxine, my readings were in the normal range, my new GP looked back, saw the original normal reading and immediately stopped my Thyroxine. From there, my readings shot massively into the hypo range, probably as a rebound of coming off the Thyroxine. 4 weeks later things were still slightly hypo but more level and I need to get another TFT done to see if its gone back to normal. The thing is, I'm so exhausted all the time and can't stop sleeping, so I'm off work sick at the moment. Could this have anything to do with being on and off Thyroxine?