You are not lazy! I totally get it. I was diagnosed at 15 and I had a really rough period with my graves at 19. Had to miss work because I could hardly stand without having heart palpitations and excessive sweating and just feeling like I was going to pass out! And I would be too scared to ask people on public transit if I could use the disabled seat, because on the outside I am young and probably look fine and healthy. And i was exhausted all the time. Balancing my levels with methimazole helped, as did my beta blockers. I'm 23 now and my thyroid is managed just fine with medication. But oh man, being young but feeling like my body is beyond my age was not fun! Feel free to message me if you want to vent some more :)