Turning Nocturnal

I went to sleep at 5am yesterday and didnt even notice, then I woke up at 430pm today. Its going to be dark in a few hours. Where did my saturday go?? Ive been going to sleep later and later every night and waking up later and later in the day for no reason at all, other than i can't sleep. So now Instead of spending the day with friends, I'll spend the next few hours doing homework and studying. However, Im not sure if this has helped or hurt my productivity. I seem to be spending more time on school work when I wake up late because I don't have any plans made yet.