I had unprotected sex on day 24 of my cycle (so on may 18th). I Have a regular 28 day cycle that lasts 5-6days. I am not on Birth control. So, i took plan B one step a few hours later that same day. My period was suppose to come on may 16th (so 4 days later). It is now may 18th and i still haven't gotten my period. I am 2 days late. I am planning on taking a pregnancy test next week. But in the mean time , i wanted to know my chances of being pregnant. And i know i was stupid to have unprotected sex and that the pullout method doesn't work , blah blah blah. I just want to know my chances of being pregnant.