"i know i was very stressed and anxious when researching plan b, so i made sure to come back to share my positive experience! i took plan b approx. 9 hrs after unprotected sex. i got my period almost two weeks later (and two days early). however, i did experience minor side effects. i don&#039;t typically have to endure pms or cramps during my period, but this time around i had tender breasts in the days leading up to my period and minor cramps during menstruation. small price to pay for avoiding pregnancy! good luck, and don&#039;t worry."