Is It Possible To Get Pregnant After An Unprotected Sex?

Hello Doctor,
Me and my GirlFriend had Un-Protected Sex. I really don't know how to explain but we really didn't have a kind of Intercourse, but I just inserted not even half of my Penis inside her Vagina for not more than 2-3 seconds and pulled it out and the tip of my Penis was wet, am pretty Sure i didn't Ejaculate. But am worried will my GirFriend Get Pregnant. Please Help Me