Glad it's just bruising. It will hurt for a bit. Make sure you take watch for the pretty colors that will show up.
I fall down our stairs quite frequently thanks to a little furry girl that likes to get under my feet! I'm just glad it's only 2 steps that I miss and not all of them, that would really do some damage. My stairs are cement with ceramic tile and the edges are pretty sharp. Anyway....I usually get some pretty yellows, purples and blues that emerge from the bruises. I keep saying I'm going to install some pillows at the bottom of the steps lol