Go to the doctor, and tell him what happened. Anytime you have a significant injury to the neck or head, and there is pain that won't go away, you should go to the doctor and have it x-rayed to make sure you didn't crack anything. Sounds scary, and it's probably nothing except a pinched nerve, or sprain. But it's always best to check it out. In the meantime keep taking Aleve, and possibly a Vicodin every once in a while to ease the pain. Hope you feel better soon!