On march 29th, 2013, I had a total thyroidectomy. Im 17 years old, before the thyroidectomy i was on 100mcg of levothyroxine and they still have me on the same dose after the surgery. I've always a regular menstrual cycle until now, my last period was march 12th, I haven't had one for April. Is this from the surgery or what? What're ALL the side affects and after symptoms of a total thyroidectomy? I really need answers.