How can I keep myself while waiting for my abortion to happen

So I’m 15 and this weekend my parents are driving me out of state to get an abortion. We’ve talked about all my options and this was what I chose and what I thought was best. It wasn’t consensual and I can’t handle the constant reminder of what happened to me and my parents were extremely supportive. We’re leaving Sunday and I’m freaking out I’ve never had any major medical procedure and I haven’t told my friends what happened or what I was going to do because I fear their reaction.

How can I keep myself calm and not think about it?