I can fall asleep anywhere, anytime

In my second year of high school, I started experiencing different sleep patterns. In class, I would doze off and get into really heavy sleep, even experience dreams.  And then at night, I would lose sleep in the middle of the night. I’d sleep so much during the day, that I’d be sleepless at night. This became a cycle. I didn’t understand what was happening, and my classmates would tease me while it landed me in trouble with the teachers. Some thought I was lazy, or eating too much. Others said I was bewitched.  This got me somewhat depressed because no matter how much I tried not to nod off in the day, it would happen.