He came in me for the first time since I'm on depo...

We've been dating for three years and he never came in me. it was always withdraw. But now that I'm on depo we thought it was okay for him to cum in just to understand what it feels like for the both of us for the first time. I've been on depo for a month already. I'm just curious.. Is it more possible for me to get pregnant since it's the first he came in me and there's actual sperm that's inside me. And it stays in there for like seven days something like that. Anyone know of someone who got pregnant on depo HONESTLY?