17, and scared

My boyfriend and I had sex and our condom broke and I'm ovulating in 4 days and I'm really scared that I could conceive. I'm only 17 and I have no way to get emergency contraception or a pregnancy test and I'm freaking out. I don't get my period for another month and I can't tell my parents because they would kill me. I don't know what to do and I'm scared. My friend said it's unlikely that I'll get pregnant but I find that kind of hard to believe.