Sir,I had hypothyroidism and was asked to take 100 mcg thyronorm. I am taking this for the past nearly 2 years. Suddently, during the last 3 months, I started sleeplessness, chocking, palpatations, breathing problem etc., and now I am asked to take only 50 mcg. Kindly confirm whether it is because of overdose and how hypo has become hyper.