How To Treat Pain In Foot Due To Sprain ?

I went to the ER this past sunday the dr told me I had a sprained my foot and gave me pain meds and crutches and sent me home; however, I noticed when I got home my discharge papers said I had a contusion not a sprain. Now almost one week later I can't put any weight on the ball of my foot. I can walk but only if I put all the weight on the outside of my foot. I can lift myself off the ground and to the ball of my right foot, but when I try with my left nothing happens I just can do it. Could I have a broken bone and not just a sprain or am I over reacting?