Oh my. Managing to hold on with only 2-3 hours of sleep per night is beyond me. I need at least 5, and I usually sleep around 6-7. Anything above 7 feels amazing.
Honestly, I don't know how I do it, but I do it. But I tend to fall asleep during class. But some teachers don't think i'm sleeping cause I learned to sleep with my eyes open. But that doesn't help during gym :/