I have this habit of staying up until 12-2am, which is not good since I'm a scholar. The next day, I wake up at about 12-1 pm. I always figured I had an irregular sleep pattern and all I have to do is try to regulate it, but now I'm starting to think its something slightly more serious.

During the day, I'm extremely tired. But during the nighttime, I have difficulty falling asleep because I'm not tired. I read that insomnia is the inability to fall asleep even when extremely tired, but when I'm tired, I can fall asleep rather easily. My trouble, is I'm not tired.

So, is it indeed an irregular sleep pattern? Or am I suffering from a different type of insomnia?
Actually, I don't snore. And I don't kick, either. I do toss and turn alot, though.