HELP ME NEED ANSWERS!

Hey... I'm 14 years old and stressing out and I'm embarrassed about this. But best guy friend and I did things but we didn't have sex but he fingered me and might of had cum on his fingers he swears up and down he didn't and he knows what he doing but I worry a lot. My period supposed to come on Fourth of July. Do you guys think I'm pregnant? But I'm olvating and I saw on a website that you can't be pregnant if you are olvating m? Should I be worried please someone respond.