I've been having this problem lately with my chest. Sometimes it makes a popping/cracking sound for no reason. And like this morning, I slept on my side wrong or something and the center of my chest hurt when I got up. If I stand with my hips still and rotate my upper body to the right, my chest hurts, but not when I turn the left. It doesn't always do this though, just sometimes. Right now, it also hurts if I push on it. Right in the center of my chest, about an inch or so above my nipples. I've never noticed any pain while doing workouts though. I'm thinking any number of things could've caused this, dips, incline db bench(going too low), maybe even hanging too low on chins.
Anyone know what this actually is? It sucks because I haven't been lifting for very long, and I already have something wrong with me?