I had my thyroid gland (goitre) totally removed about a year ago, a few months later I noticed I was always tired, easily pissed off by people and sometimes I get chest pains and palpitations.I am afraid I might not live as long as I am surpose to. I am currently on 100 mcg. Am I just being paranoid?, will this side effects kill me before my time?. I am really worried. I have three little kids and I want to see them grow up by the grace of God.