I am a Type 1 Diabetic and I have had an underactive thyroid for over a year now. My last blood test was July 2017. My T4 was 14.4 and TSH was 7.1. I was on Levothyroxine, but it didnt make any difference. I constantly feel weak in my arms, always tired and my memory is poor. My next blood test is at the end of October. I'm hoping I have got worse, so the medication will help. Any advice for me?