What Are The Chances Of Pregnancy After Non Penetrative Sex?

 so me and my boyfriend were having oral sex and he came immediately so he went wiped everything off and then changed his underwear and then a little later he decided he wanted to try again and we 69 and then he asked if he could tease my vaginal area mind you I am a virgin :/ im so terrified that I can be pregnant even though here was no.semen on his penis but my vaginal area was very wet so could I be pregnant or is it just in my head :( please help