What Are The Chances Of Getting Pregnant Without Penetration?

Me and my boyfriend were messing around a couple weeks ago (I am a virgin, never had sex) and we started "dry humping" and he came in his underwear, wiped it off, and then we layed down for maybe 5 minutes or so. He then fingered me, and I don't think he had anything left on his hand, and if he did it was a minute amount. I got my period 2 days later. Is there any way I could possibly be pregnant? I am very worried!