emergency contraception
"I took Plan B on the last day of my period, 3/13 (first day was 3/9), 16 hours after the incident. I am not on any birth control so I didn't know how it would affect me. On 3/15-3/18 I had some light bleeding from the hormones and this was pretty painless. I also was very fatigued and my breasts were sore the week following Plan B. 4/4-4/8 I had some terrible cramps and back pain and sore breasts that I convinced myself was early pregnancy, but I took a test and I'm baby free! Plan B definitely works before you ovulate, and make sure to take it as early as you can.  Be safe, and be protected. The worry from this was NOT worth it! If something does happen, this is a great back up plan."