I probably sound silly.

I didn't have sex. I was fooling around with this one guy and he had a small amount of precum. He tried fingering me but he didn't know I had a tampon in (I thought I had my period Bc pinkish spotting but I think it was my fertile days ending) anyways, I feel like he had a little precum on his fingers when he tried to finger me. I don't think he got far in because of my tampon. I freak out over little things. Is there a chance I could get pregnant? He also got some precum on the outside of my swim suit so idk if it's possible or not. I know there has to be penetration for impregnation to happen. But can someone put my mind at rest? My period was supposed to start today and I've had nothing..