I have been taking thyroxine for many years now after having radioactive iodine. Recently I had been feeling anxious so I went to the doctors. She ran a thyroid test and it was discovered that my thyroid levels were slightly high. The doctor reduced my thyroxine from 100mcg to 75mcg. It's been two weeks now and I am still eating everything in sight, if I don't take beta blockers, my heart pounds and I'm not sleeping. When will I start to feel better, I hate feeling like this, I get anxious when I can't sleep.