Am I just off!?

Okay! So like a month ago I had sex with my boyfriend and we didn’t use protection we were both a little drunk. And now my period is 5 days late, no I’m not stupid! Unprotected sex = pregnancy. But I stopped it before really anything happened! I know he didn’t finish in me. But my friends keep telling me I’m probably pregnant and it’s making me panic! I’m only 18. I’m still a kid! I just need some advice....

and most of the time my period is a little late, like a week sometimes so idk what to do... and no I’m not on any kind of birth control... yes I’m an idiot!