Do you have a disability and what is it?

I don't know if I'd call it a disability. It is legally a physical disability, but I'm not completely impaired. I have no shoulder on my right arm. Hand/arm is basically paralyzed. Little to no feeling in it and it's short and limp. Also there is lots of nerve/tissue damage. It happened during birth. They yanked on my arm to get me out and they messed my arm up. The term is called Erbs Palsy or Brachial plexus injury. More common to occur during birth, but it can happen at any time.