we had unprotected sex last september 7 at exactly 11pm and i took 4pills of nordette after 12hours so i took 11am in the morning and i took again next day at 11am again in the morning.. i feel worries because im not followed the indicated that take 4pills of nordette after 12 hours and take again after 12hours.. but i took the second dosage of medicine after 24hours.what will i do? my menstruation is on september 20 but until now i dont have yet bleeding earlier.please answer my question.im so depressed.