I Think I May Have Broken My Rib. I Fell

I think I may have broken my rib. I fell 1 week ago and thought I had just bruised my side but I have a noticeable protrusion T the bottom of my rib cage, pain in my back and heaviness in my chest when breathing. What do I do? I"m not in much pain (was very sharp last week) but it feels like something is pressing under my rib cage,