insomnia?

i tried to sleep at 3 o'clock but couldn't and decided to stay awake through the day. it's not like i was not sleepy but i just couldn't shut my eyes for a long time. i wonder why. i woke up early the day before and i felt like sleeping when i got back home but when i tried to sleep, i couldn't, i just couldn't. maybe it was the coke i drank when i go visiting, too much coke? i doubtly think so. what else was keeping me awake? i'm not sure. but what i am sure of now is i couldn't sleep and i am staying awake. but i got nothing to do now. maybe i'll just watch some movies i have in my computer, but then again, it'll be boring after some time.
oh well...