Why am i so sleepy

You may be sleepy because you have sleep deprivation or you work nights or you can't fall asleep or stay asleep when you do.

I can't say. I don't know what you did today! Get some sleep. Deprivation can impair you as much as a six-pack of beer! ~ ChaCha!

Either it could be from your lack of sleep or your diet.

Probably because you didn't get enough sleep last night, and because it is getting kind of late. Time for bed for you!