What Causes Left-side Rib Pain That Worsens With Deep Breaths After A Fall?

I was walking my two dogs two days ago. I tripped over a piece of sidewalk and fell hard in my left side. I cut up my knee and elbow pretty bad. Once I got to my feet I immediately felt very sore on my left side at my rib cage. It hurts when I breathe in deep and it’s keeping me from sleeping. How do I know if I may have broken a rib? Maybe just soft tissue damage?