I feel tired all the time the least bit of a walk and I am exhausted. I am overweight, I have an underactive thyroid, not an excuse for my weight (16st) just saying. My bloods are clear apart from high MCHC, my tongue is swollen and sore, I feel as if I am going to burst out of my skin (sides and stomach). I sometimes get a odd feeling from my heart (ecg clear) and recently I sometimes can t catch my breath just when talking. I was a very active person up until 4 years ago (also 6st lighter) when I got diagnosed with an underactive thyroid, on 135mg of eltroxin have never felt any difference. I also sometimes have ringing in my ears. I know it sounds like I have the symptoms for everything. Please if anyone could help I would be very grateful, I am 42.