"i&#039;ve taken plan b more times than i am willing to admit, but i have had 100% effectiveness with this pill. while i highly, highly recommend regular birth control, sometimes the use of this pill is necessary. i used it three weeks ago after having sex. the condom broke at the last second and he came inside of me. i was so nervous because my ovulation window had fallen right around the same time (like the last few days of the window) and i was seriously praying for the pill to work. i had all of the side effects from the morning-after pill all week long. i&#039;m happy to say, though, the pill worked and i have my period now. do not freak out, i can tell you that using this pill, although it wreaks havoc on your body, is effective!"