birth control and pregnancy

Melonie • im only human 💕
So I'm in a bit of a pickle. I decided to stop my birth control and crazy me stopped it the end of the first week of the pack (Saturday). Literally the day after I stopped I had sex with my s/o (Sunday night) then withdrawal bled for the next 4 days (starting Monday)... is it possible to get pregnant from that one time ? I know you get fertile when you stop but I also bled... any comments ?