sternum injury with no bruise

I got an sternum injury while training in jiu jitsu. I did a takedown on a training partner, and landed on his knee in the center of my chest. It was a sharp pain right away, and then did the same thing a couple days later. It hurts to do any pushing in exercise. There was popping or cracking when it happend, and there is no bruising. It does not hurt to cough, sneeze, or breathe deeply. It doesn't hurt to pull anything in exercise, I can push over head with no pain. What kind of injury does anyboy think is? Thank you in advance.

Nate

Did you consult a doctor?

I am reminded of this every hockey season when I think back to a young rick willianen , who felt so much pride and promise every time he laced up his skates and hit the ice.