Help me!!

Hey my period is 3 days late and me and my boyfriend was just trying to have sex like not have sex i hope this makes sense but he went in no condom no sperm on his penis but he didn’t go all the way in but i told him to take it out (the head) and he was clean then like 2 minutes later a little pre sperm came out do you think I’m pregnant I’m only 15 in a half 😭