Hi. I am 30 years old, hight is 1.72 and my weight is 67kg. After my pregnancy my thyroid became big and it was then under active. I went on 50mg Eltroxin which worked great for a year. I lost 12kg s, I was 79kg. Then it became overactive, I think my physician said the count was 30. So he said I must stop taking the Eltroxin and give blood in 6 weeks time, because he thinks something else is wrong. It is now week 3 and I am not tired, but have heavy mood swings and am very irritable. I sometimes feel like I do not get enough air and my mind is scattered. Does it have something to do with my thyroid, or am I just going crazy? ;)