I had unprotected sex on August 30th (the condom slipped) and I was expecting my period on September 1st, two days after. I took Next Choice on August 31st, at 4:30 pm and then 12 hours later at 4:30 am. It's Sep 4th now and I still haven't gotten my period. I had some extremely light bleeding twice since the sex though. I did take a pregnancy test though, one on September 1st, and the other on September 3rd. Both read negative. My period is usually only for 5 days though, so as of tomorrow o I don't get it I will have had completely missed it. Should I take the pregnancy test again at a later time? Or is the Next Choice affecting my period?