Moral Dilemma

so i got my "closed book" take-home exam today. i didn't look at it...just stuck it in my notebook backwards so i can study some more before i do the exam. but i have no desire to study when the exam isn't due until monday, and my notes are right here. but if i use my notes, the guilt will probably give me away. damn my moral upbringing. and, if i do study today and tomorrow, what do i do if i don't remember something when i'm taking the test? ugh.