should I take a plan b?

So yesterday I had sex, I’m on my fertile week, I have a 27% chance of pregnancy. We used condom and we are both pretty sure it didn’t break, like we didn’t feel like breaking. I normally wouldn’t give it a second thought but because I’m on my fertile week i don’t know if I should take the plan b and be sure or if I should be good either way. He didn’t cum inside the condom and not in me either. What do y’all think? Plan B or I’m good?