emergency contraception
"I had unprotected sex April 9th and took the take action pill less than 24 hours later.... I was supposed to start my period April 18 but when the day came I did not start.  It got me so worried I never thought I'd ever want my period so bad, it came five days later and I felt super relieved.. I also stayed with my regular cycle instead of having more or less days, and was not lighter or heavier at all. My advice is take it as soon as you can and don't worry if you are late by a couple of days!!"