From tomorrow i am having exam, and i am thinking about experimenting.

Like drink alcohol. Because while it may calm your never it sounds like a perfectly good way to fail the exam. I don't drink but alcohol impaired your common sense and comprehension; two things that you need for an exam.

Water, milk, laranja suco, suco de those might help as far as keeping you in good health for the exam. Not being thirsty the whole time would be one distraction less.

I am drink alot now??????

I really hope this isn't a grammar exam, or you're fucked no matter how much you drink

Pretty sure you'll fail regardless based on how you worded that.

If you want to be a fking moron go ahead with your plan.

lol good luck with that.