"i had unprotected sex with my fiance on nov 3, he finished completely inside me. i took plan b with in 2 hours of this event. it happened again nov 5, i took another plan b. we want kids but i keep getting scared, don&#039;t judge. side effects: i had light to mild cramps from nov 7th thru nov 13th all day/night.today, nov 13th, my cramps became severe and i started my period, a day prior to my period due date. for this entire week i was pmsing, and had pregnancy like symptoms (backache, cramps, sensitive to some meat smells, extreme fatigue, bloating, i had some morning sweet cravings. i am also athletic, 145lbs, very active, all i can say is that plan b works! i booked my appt, to get birth control. not ready for kids yet! good luck ladies"