I'm no doctor but it sounds like you pinched a nerve or something, especially since you weren't really doing anything when it happened. Is it localized to your hip or is it shooting down the back of your leg? My thought would be that it will subside on its own, but if it's still around in a few days you should probably have it checked out. Have you taken advil or tylenol to try to dull the pain? I'm sorry I don't have any more advice...maybe someone on here is a physiotherapist and can give some better advice. So sorry to hear you're in pain.
