J.W.
I'd take him in just to be safe. It sounds like it could be broken, and if it's not set right then it could grow differently as he gets older. I broke my nose in 5th grade and developed a large bump as a result and it bothered me so much that in high school I got a nose job! (There's nothing like being called Blossom - that gal from the 90's tv show - by the kids you babysit :( )