Hi, I was diagnosed with underactive thyroid last year. I am 44 and have suffered with my health for around 20 years now, which all started with depression. I was diagnosed with fibromyalgia about 6 years ago, then chronic fatigue syndrome July 2015. The symptoms of both conditions are very similar and I suffer most of them. Now I have underactive thyroid. I have been reading a lot about it on here and other sites, and have noticed a lot of people mentioning they also suffer with depression... which isn't surprising with how we feel every day. What I was wondering is... have I had this underactive thyroid for a lot longer, but because the symptoms are very similar to fibromyalgia and chronic fatigue syndrome, the doctors have misdiagnosed. does anyone relate? I am on 25mgs of levothyroxine, but I feel as ill as I did before starting them, so am going to my doctors next week. I am also taking duloxetine and nortriplyline for my depression. Also I am constantly warm, and sweat if I do anything.. I have not felt cold all winter. last summer I sweated constantly even when doing nothing. is anyone the same? my doctor said I have started the peri menopause, but I don't think its that as I know with that is more hot flushes rather than constant sweating.