paranoid that I'm pregnant

My boyfriend and I never had sex. The farthest we went was fingering and pressing 'it' against each other - clothed of course, w/ pants and everything. I know that maybe I'm just worrying too much, but I just can't help it.

It happened a few days ago, when we were doing things and he went to the bathroom after. I heard the sound of the sink so I assumed that he washed his hands. But he started fingering me again, and is it possible for me to get pregnant with that? I've read some articles and q&a's about similar situations, and it said that getting pregnant with fingering is nearly impossible but NOT impossible. I'm also not sure if he touched himself before fingering me.. 

I just don't know what to do. My period's supposed to come today, but you can't really consider a day, as late right? My stomach's been hurting too ( but since there's probably a lot of reasons why my stomach hurts since I don't eat much ) I was just hoping if someone can clear my mind up, since the answers that I found online are contradicting one another. I'm still a teenager, and I'm just hoping for an answer that I can trust.

I know that I should knowledgeably do something like this.. but please, please help me.