emergency contraception
"I had unprotected sex two days after my period ended. I took the plan b within 12 hours. Two days later I started bleeding lightly and it lasted 3-4 days. I didn't think this was a normal period so I still expected to get mine at the normal time. I didn't come. I freaked out. I was one week late and decided to take a pregnancy test. Negative! That same night I started my period. Maybe the light bleeding was the plan b working and it reset my cycle because 28 days after that I got my period. I'm now on birth control. No kiddos for me thank you very much. Thanks plan b!!"