Sleep problem

I have trouble with my sleep sleeping (not gramatically incorect, but it sounds better). Sometimes I'm still awake until at 9 a.m. or even i didn't sleep the whole day then slept back after class over. or I don't sleep the whole day but then sleep after class. I tried to go to sleep early than i usually earlier than usual, but I ended up opening my laptop and did doing something unimportant. I couldn't even close my eyes because I got had something inside my head that kept rolling around, and at the same time my heart beat faster and made me want to stay awake. I need to do something with this, and got I'm going to rip this panda eyes soon. (I don't know what you mean in this last sentence, but I've made it gramatically correct.)