first of all you need to relax. all the extra stress that you are putting on yourself is not worth it. if you used protection, why are you sweating it so bad? once you do start your period youre gonna realize that you were worrying for nothing. chill out and try not to let it bother you. if you do happen to not start..wait 5-7 days before you take a test or go to the doctor. your stress levels may have caused your system to just be thrown off a bit. GOOD LUCK.....remember RELAX!