Hi. Thanks for your help with suggestions as to how to feel better. I have been back to Doctor and he has agreed to do the t3 & t4 test. I asked about fasting and not taking the levo and he said that would be fine. I can't have it done until mid June as there has to be 8 weeks between tests apparently - maybe that is just where I live. I am so pleased that I am able to talk to my GP and he will try to be helpful.