Worried

Hey, first time on here and don't really know how to put what I'm about to say/ask but, me and my boyfriend were having sex earlier and afterwards he came on a baby wipe that was put on top of my vulva and I'm pretty sure I felt cum dripping down into it, I quickly wiped myself but I'm just worried and want to know if possible, if the cum did in fact make its way inside, though only being a small amount, that I could get pregnant? Thankyou in advance for any help x