I just need someone to talk to.

I missed my period by 8 days, so my boyfriend and I bought a pregnancy test. It was positive. I'm 15, turning 16 in less than a week. I fucked up, and  I know it. I'm scared. Now I'm stressed and unhappy, because my boyfriend and I are kinda fighting about some stuff (not in a break up way, just like we're both stressed and upset right now) and I can't talk to my parents about it all. They don't even know I've had sex. So I definitely can't tell them I'm pregnant. There's a clinic about an hour away from my house where they do free abortions and things like that. But I have no idea how to convince my parents to let me go there with my boyfriend, especially since they've said no to me going there in the past. (Mostly because the highway isn't super safe to get there and it's really far.) so I'm scared and upset and unhappy.