Hi, I'm 16 And A Week And 3 Days Ago

Hi, I'm 16 and a week and 3 days ago I lost my virginity. We used a condom the whole time.. My periods are usually irregular I never know when I'm gonna start (or at least I don't track it). Anyway, we used a condom and it didn't break and he didn't "finish" & I've asked several health people what they think.. So with this information do you think there's a possibility of a pregnancy or am I just stressing over nothing since it was my first time?