Why is my chest cracking like this?

For almost three years now, every day I've been able to sit in a chair, puff out my chest and if I pivot my upper body from side to side, my chest cracks exactly like my back or knuckles would. It doesn't really hurt too much, but sometimes when I sneeze the pain I feel in my chest afterward is excruciating. I'd like to know what might be happening and if it's worth visiting a doctor for.