Ok so Saturday I had been on my cycle for about 5 days. Well Sunday morning around 5am or so me and my s.o had sex. We didn't use a condom. He did go in me. I had my cycle for about another day and a half. Tomorrow is the last day I can get the plan b pill. It's saying my fertility window is in 6 days. My question is...obviously there is a small chance of pregnancy. But how big is that chance? Please, no negative comments. Just wondering, thank you in advance!!!