No Rest for the Weary

I have to be at work at 8:00 am everyday. Last Saturday and Sunday I had to be at work at 10:30 am and 8:30 am, respectively. I've been looking forward to this weekend since about two weeks ago. This was to be the first time I could actually sleep in. So pleeease tell me why I woke up at 7:45!!! Why can't I just sleep, even when I want and am able to? This is sooo frustrating. I'm up and I can't fall asleep, and I don't want to fall asleep while I'm watching football today. Ughh.