I am so fed up. I was dignosised with an under active thyroid 8 weeks ago. My iron levels have been dropping over the past two years, rapidly . My doctor has arranged to test my iron levels. I had the flu for two weeks and now I am left with a sore throat, aching legs and weakness. I have had reoccurring site throats for over a year now and each time it's either been a bacterial or virual infection. Could you please advise as to possible causes of being constantly unwell and whether the sore throat, weakness etc are normal following flu. I also have an increased appetite and am struggling to control the amount I eat which I usually have no problem with .