Hi I am on 125mg thyroxine and 10mg t3 I am feeling very anxious and sweating a lot I have palpitations sometimes not always , my temperature is usually low about 65 . I'm wondering if I'm having symptoms of being over medicated , or is it symptoms of b-12 deficiency , my blood test 392 , reference rage 180 - 2000 . My doctor says its normal , but I can tell you I certainly don't feel normal . I was diagnosed 12 years ago although I felt ill for years before being diagnosed . I have tried different doses of thyroxine but still feel awful , that's why I'm wondering if It could be vitamin b12 defienciency . I'm thankful for any help .