What are the chances of becoming pregnant while taking plan b when you’re fertile? My boyfriend and I did a stupid thing whilst on vacation, and drunk... he came in me and I was fertile at the time. We went to go look for the pill the day after only to find out that the pharmacy was closed and we were out of town. So when I got back home I took the plan b 3 days after the incident bc I had a drink on the second day and didn’t want to risk taking plan b while having alcohol in my system. I am now 5 days late from my period, is there any chance that I might be pregnant?