Help please!

I'm 15 and I don't know if I'm pregnant. I was fooling around with my boyfriend and I gave him a hand job. He didn't cum, but there was some precum. Afterwards, he and I both washed our hands and he fingered me. I don't know if he touched his penis afterwards. However, he sorta wiped his hands on his jeans. Note, this was after he washed his hands, so they were clean. A couple days before, I was getting PMS and now after we did stuff, its gone. My breasts are not sore, and discharge is gone. No cramps. Its been 4 days since and I'm extremely stressed out! If I'm pregnant I don't know. I'm terrified. My parents would hate me. I can't get a pregnancy test. I don't know if there's a chance of me getting pregnant. I'm scared. We're both straight A students and I don't want a baby to bring us back from our studies. Could I be pregnant, or am I just overly stressed? I am supposed to get my period in a bout 2-3 days.