Boyfriend is a Fireman, hurt himself during work?

My boyfriend is a fireman, and he recently fractured his leg during a fire, and the fact that I was so worried about him made me realize how much I really do care about him. But when I talked to him, he just shrugged off the injury, saying that injuries happen all the time in his field of work. Now I feel like I would sound clingy if I talked to him about how upset I was over him being injured and all, so what should I do?