emergency contraception
"I've had to take plan B twice (well, technically the off-brand they have at my pharmacy), both times during or after ovulation. The first time I hardly experienced any side effects other than my period coming two days early, and I didn't get pregnant. The second time was a couple weeks ago after my boyfriend and I had been going at it, and when he pulled out to switch positions I heard him say "...oh" and he pulled the crumpled condom out of me. About 20 hours later I went and got plan b. I was nauseous and cramping the next day and had more cramps for three days leading up to my period but it came on time! The pill works, don't worry yourself."