Yes the anger is there, but you really need to focus on allowing that anger to pass, as this does not help at all!! are you seeing a Dr. for pain management? and for therapy on dealing with these issue?
Are you on medication? Were you on medication? Are the anger and anxiety long-term problems, or did they arise after being put on certain medications or soon after being taken off certain medications? If you see what I'm getting at here, many medications can cause temporary or even long-term anxiety and anger. Explore every avenue to make sure it's just the current pain situation. And I second silverberg, I hope you're getting good therapy and treatment for the pain. Don't let yourself get isolated, it'll just become chronic. You already have enough to deal with. Good luck.