emergency contraception
"I had unprotected sex on October 27 and took the pill 12 hours after because I realized I missed a pill the day before I had sex. I had knee pains right after taking it. I heard that if you are over 175 that the pill may not work (im about 240). 6 days after taking the pill I started having back pains and cramps on that day I also had a situation that made me emotional. Luckily my period came on as scheduled."