feeling paranoid after getting fingered

I really don't like asking this. I'm 15 yrs old, and I would talk to my mom about it, but I'm not completely sure and I don't need her getting freaked out. alright so it's been exactly 2 weeks ago today when my boyfriend and I were messing around. the whole day is like a blur to me now and I hate thinking about it but this is what I remember. I remember touching the tip of his penis, it was moist but I licked my fingers afterwards. It wasn't that much at all, just a little wet, I didn't think that much of it! then we made out for a while and Im pretty sure I touched myself with the same hand, I didn't stick anything in though just kind of rubbed the outside, then he started fingering me. Im almost positive he never touched his penis, but then he started going down on me. thats all we did. we've never had sex before and this was the first time he fingerd me. but I'm terrified, could that little bit of precome gotten me pregnant?

it's weird though, because the next day I got my period, I wasn't expecting it, it was maybe a week early, a little heavier than usual and only lasted about 4 days. since then my stomach has been feeling so strange, when i press in it feels hard, i dont really have cramps but more like a straight pain in my side sometimes like when you get when go for a run, im a little gassy which i never am, my back hurts a little, and just last night my breasts became sore. it feels like I have all the pregnancy symptoms. sometimes I feel like i am making myself sick whenever I think about it, i know that its unlikely that i am but i have trouble sleeping, it is always on my mind. im paranoid, and scared to death. Should I just until next month and see if I get my period or not? what if I dont? im always a little irregular though. AND if im not pregnant why do I feel this way? could I just be paranoid because im becoming sexually active for the first time? I'm sorry this is so long, but i need someone to tell me SOMETHING.