Fell Wednesday

So I fell down two steps Wednesday I picked myself up and went on my way. I didnt fall of my belly or anything so wasnt worried and obviously I could walk, so I was good. Now today and since my foot has been bothering me pretty bad. I can still walk just have pain in the top of my foot and travels up my ankle, my foot is lightly bruised and not really swollen, does this sound like a sprain or a stress fracture or what? Ideas please!!!