Pregnancy/cumming question

So the other day I had sex and my partner didn't have a condom on. He pulled out way before he was about to cum but when he did cum it was around my stomach area and a little lower. And when he went to wipe it off he wipes it near my vagina. Should I be concerned about pregnancy ? I know it's more likely to get pregnant if he goes inside but how likely is it if it goes near my vagina.