I was diagnosed with hdsiyhyroiotpm when I was 8 years old 67 years ago and have been on medication to keep my thyroid stable ever since. Once, after a very serious surgery, I forgot to take my pills for a few months and became very tired and somewhat retarded. I couldn't remember what I'd been doing an hour previously, would hop in the car to grocery shop and a block from home, couldn't remeber where or why I was going. My phone number even evaded me. As long as I take my thyroid pills, Im fine but if I forget to take them, I'm in trouble. I know when my thyroid is out of balance. So, is this a serious or mundane form of hdsiyhyroiotpm?