i wan to sleep!!!

i wanna sleep!!! i juz cant sleep well tis few days... izzit health problem or wat?? or maybe im too worried bout e-run?? everytime when i close my eyes everything related to e-run started to pop out!! pop pop pop POP! give me a break!! i hav test tml nite! let me sleep plz...plz... n my cgpa is dropping!! arrrr!!!!