"accident can happen. condom broke on that day sep 5th. which was day 12th of my cycle fertile day. i rushed to get plan b as i am not on any birth control pill. i had taken the pill 15-20 mins after sex. i did experience lower stomach cramps but not to painful, dizziness and tiredness at that day. i was expected to have my next period on sep 22nd for my normal cycle. however i got my period yesterday sep 18th. 4 days earlier.. i was so happy that plan b works..."