it's too early...

Why am I up so early? It's not as though I slept early last nite. I think I slept rather late last nite compared to the past couple of days, so why am I up so early? I duno, maybe there is a lot going on in my mind than I'd rather admit to myself. Maybe I'm unconsciously trying to push away things that would potentially distract me from studying efficiently. Sometimes I think it doesn't work though. For example, just yesterday morning when I woke up early to try to cram for my midterm at 12.30, I couldn't concentrate. My mind kept drifting off to different memories I had. It was bad, really bad. After I'd notice that I had started day dreaming or what-not, I'd try to will myself to concentrate again. It seemed to be that any word I read could lead me to think off in a tangent. That really bothered me, especially in my last hour or so of cramming before class. I went in to write the midterm feeling pretty unconfident about myself. After that, I realize that there was a chance that I'd some odd days where I wouldn't be able to concentrate well, I vow to study ahead of time for my finals. I really have to do well on my finals if I want to bring my marks to where I want them.
A question I have to ask myself is why can't I be more focused when it is essential that I do? There is plenty of time to day dream or reminisce. I guess I have to really work on exercising control over myself.