Had r thyrod removed in 2004 had l thyroid plus central neck disection in july 2010 found 1mm papilary cancer they are treating with increased thyroxine. Have become thyrotoxic my tsh is <0.01 my free t4 33.9 my free t3 7.3. Have dropped thyroxine from 200 to 150mg become weak, dizzy,heart palp,sore eyes and chesty today, slight fever but gp thinks may something viral coming on endo away am worried. Iam 35 mother of 4