is pregnancy possible if

hello, i am 17, So this happened around october first week, me and my bf did oral sex (take note: we didn’t have intercourse nor actual sex) I blowjobbed him, and kissed him after wards then he went down on me to return the favour, is pregnancy possible? like, Did i transfer his semen from his penis to my mouth then to his mouth after kissing then he went down on me? is pregnancy possible like that? he didn’t cum during the oral sex but im scared what if he had precum and i blowjobbed him. is pregnancy gonna happen or am i just paranoid