emergency contraception
"I had unprotected sex three days before ovulation, and took this within four hours after having sex. After reading some of the reviews, I was a little wary of how well it would work. I ended up experiencing my normal ovulation symptoms as well, which made me even more worried as this pill is supposed to prevent ovulation. I didn't experience any side effects (no headaches, nausea, etc), but I did have some cramping that began about four days after I took it, and continued off and on for about a week. My period ended up coming today, which is three days before I expected it. Give it time and try not to worry!"