Am I pregnant?

Heyo so I need help. My boyfriend and I had sex on the last day of my period (there was literally like no blood and I was able to go without a tampon) we used a condom but it broke and he came inside me. I’m not on birth control or anything but we immediately ran to get plan b and I took it like 45 minutes or so afterwards. What are my chances of being pregnant?!!?!? I literally am not ready for a baby and neither it he😭😭