My boyfriend and I had sex on March 10th without a condom but it didn't last long and he did not finish inside me at all. However, there was probably precum. I took the Plan B One Step about 36 hours after. March 10th was supposed to be day 1 of ovulation for me but I don't keep up with the app so I'm not positive. He also has a huge "party lifestyle" which I heard lessens the chance of being fertile. I haven't had any early pregnancy symptoms like nausea or breast tenderness, or any of them really... But what are the chances of me being pregnant?