"it works. i promised i&#039;d write a review because i was freaking out looking for information just like you probably are. i took it about 10 hours after the incident. i was at the beginning of my cycle. my period was about 3 days late, and then the next month it was early - about 10 days after the period after plan b. it took a few months for it to get back to normal. both periods were like normal periods. try not to freak out but i know that&#039;s easier said than done."