Was diagnosed with under active thyroid nearly 6 weeks ago then prescribed 50mcg levothyroxine . I went back to see my doctor last week to say these pains in my fingers wrists elbows knees feet also neck & shoulders seem to have started since taking the levothyroxine . Doctor insists it's viral , I have had ongoing chest infection for last couple months . I did explain both my mum & my gran were really bad with rheumatoid arthritis & both in wheelchairs . So I am now having blood tests for antibodies . As no nurse available to do this for another 2 weeks . I am now back to work after 6 weeks off the doctor has given me phase to work 4 hours a day for 6 weeks , as normally I do 10 hour days over 4 day week . I work in a very busy call centre & type all day on computer . My manager wants to start to increase my hours over next couple weeks?? Going against doctors advice already . Understand they want me back doing the job as soon as possible . Guess it's the world we live in pressure pressure take your pill get on with it .