My toe nail is falling off and I'm not sure what to do.. 

I am 15 and recently went to get my toe nails done(pedicure) and shortly after my nail turned black and blue and now it is coming off! I never experienced anything like this before and I'm not sure what to do. I feel like I should see a doctor but what can they do just pull it off? I'm scared it can get infected if I don't do anything and tonight after a while of procrastination it's starting to come off more and it hurts to even wear socks. Since its Wednesday at night I can't go anytime soon. Any advise?