I Believe That I May Have Bruised Or Cracked A

I believe that I may have bruised or cracked a rib during a fall while snow skiing. I have quite a bit of pain below my left breast. I thought it was a pulled muscle, but now I believe it may be the rib. I took a pretty hard fall on the hill on Sunday and it is now Friday night. How do I determine if it is just a muscle pull or something to do with the rib?