Why am i making myself suffer like this?!

My normal sleeping schedule is like really effed up right now.

I've not been getting much needed sleep lately and yet I don't feel tired.

I should be facing my books but I'll end up facebooking instead. 

Can someone recommend any exercises or vitamins that can help me remember everything that I've learned?

I'm so worried I'll forget everything when I walk into the exam hall...

I think I've been acting a bit pessimist lately.

Maybe it's because lack of sleep...

So glad that exams will be over in a week.