Wet humping

Hello. I'm not a teenager but still virgin and so afraid to get pregnant because I'm not ready and this is my first time. Me and my boyfriend doing such a thing like wet humping, he got no underwear so as mine. We rubbed each others private parts, he didn't go inside of me but I'm so worried about the precum, because it goes all over the outside of my private part but no ejaculation at all. I still have no period on this month, will that can cause pregnancy? :(