Hey So Me And My Girlfriend Were Together The Other

Hey so me and my girlfriend were together the other day and she gave me a handjob about an hour before we had unprotected sex, I didn't have any precum during the sex and I didn't cum it wasn't very long before we decided to stop until we had condoms, but could sperm cells have stayed on my penis (my cum after the handjob was wiped up and disposed of) and gone into her to risk pregnancy?