I was found to be hypothyroid about 6 months ago and started on 25mg Levothyroxine per day. After two months my TSH blood test was redone and my dose was increased to 50mg a day. When my TSH was done 2 months ago I was told it was satisfactory and kept on 50 mg. My T4 and T3 have never been tested and my gp hasn't said anything about any more blood tests. I have since found out that my last TSH was 3.8 but I'm sure I read somewhere that ideally it should be lower on Levothyroxine. My fatigue is still very bad but as I also have myasthenia gravis and seronegative Sjögren's syndrome it's hard for me to know what to blame for what. Any help would be appreciated.