Terrible Sleep Schedule

It's Monday afternoon and I just woke up from a two hour nap. I never napped at all in high school, yet I came to college and swear I probably wouldn't be able to get by without them. I guess it could have something to do with my staying up till 3 or 4 in the morning on the weekends and then sleeping in till noon. It's like I have terrible jet lag when I have to wake up for my 10 o'clock class on Monday morning. Then I sometimes take a nap after classes, so I stay up later that night and the cycle continues. I find it harder to focus and am much less animated and bubbly than I am typically. But I guess that's how it'll be until I learn to change my schedule... but the weekends are so fun...