Getting Ready For SPM!!!

I gotta study! as im in form 5 this year, i just have to.. well, actually, i want to.. there' s something in me telling me to.. whenever my parents tell or advise me to study, i wouldn' t! i would only study when i want to and not when ppl tell me to! but sometimes i feel bad by not studying but busy playing computer games especially when the examinations are just around the corner.. God please help me! im afraid of studying early cause then i would forget what i' ve studied earlier (trust me, i had experience in this) and when i study at the last min, there' s not enough time! im doomed! but i believe i can do it cause i believe in God and im honest in doing examinations which means i dont copy nor cheat like some hypocrites do, i wonder what do their religions teach them