I am completely lost...?

So im in grade 10 doing work experience this summer and i applied to footlocker. I've called and stuff and so the manager asked me to drop my schedule by the store which i did. So it's been a week since and she hasn't called me or anything yet and i don't know what to do. should i call and ask if she still wants me to work experience there? I am completely lost. I have to hand in these forms and schedules of when i will be working in a few days and i still havent done an interview yet. Well, i would have finished the interview by now but on that day she had some sort of meeting to go to. i also have problems talking to people on the phone. I stutter and get really nervous and say really stupid stuff. What should i do?