"i had protected intercourse a day before my scheduled period and the condom broke. i freaked out and it was the 1st time it have ever happened to me. so within a hour i took plan b one step and later on that day i experienced nausea, tiredness, a little diarrhea and tender breasts. so within 5 days (my period came on 5 days late). i had bleeding and cramping, the bleeding lasted for 6 days (i&#039;m guessing the 6 day bleeding will be considered a period). it have been a month since the mishap, now i&#039;m waiting for my scheduled period for this month(december). it says it will cause menstrual changes, so now i just have to wait."