"i took plan be one hour after unprotected sex. i waited two weeks to get my period, and it was a very stressful wait. on the second week, i began getting weird cramp-like feelings. i was worried i was pregnant. the day before my period arrived, i was extremely nauseous. however today i woke up, and my period arrived! i was so relieved and happy. except today, my cramps were so bad that i actually threw up and was quite dizzy. it&#039;s all worth it though, as i was extremely scared for two weeks. if you are reading this, please don&#039;t stress! the pill is very effective, and is over 95% effective taken within the first 24 hours."