Is pregnant possible ?

I did a blowjob on my boyfriend and I was wearing only underwear and a very thin pad (the everyday ones).He cummed on my boobs while I was sitting in front of him and I felt the sperm started to go down to my belly and then to my underwear.Can I get pregnant that way?Like I know it’s stupid but can the sperm get through my underwear and my pad while I was sitting inside my vagina?