Insomnia?! -_-"

Almost everyday after I have no class, I sleep at 4am.. I dont know why. It`s just because that I cant fall asleep. Yesterday I tried, I off my lappy around 11pm something and lying on bed. I failed! I failed to fall asleep! Keep rolling on my bed until my roommate sleep. -_-" I think it`s around 2am something! you tell me, you tell me!! What the heck is this?! Not that I dont want to sleep but I cant fall asleep. HElp me!!!! T.T

Perhaps I`m having some kind of disease called insomnia?! My organs are going to dysfunction soon! :s