Ovulation--pregnancy?

My boyfriend and I had sex during my most fertile days (I didn't know because I hadn't looked at Glow until after and I was like ooooops....) but he NEVER cums inside me. And he just so happened to do it three nights in a row all on fertile days. Not really TTC, but if it happens so be it. We didn't use any protection. Do you think I could get pregnant the first time he doesn't pull out? Lmao it would be so ironic cause he always stops...