So me and my boyfriend were having sex and he cummed he wiped off the cum with his hand(mind I say I didn't know he cummed that's why I went right back on top of him) and when I got back on top of him I was gonna put it in when he said something about him cumming (the tip rubbed on my vagina and the tip was just barely going into me like a cm or a little less) I quickly got off and he said he got it off that it was ok this and that but is it possible that I could be pregnant? I was on the last day of my period too.