I Dropped A 10lbs Wieght On My Foot Over A

I dropped a 10lbs wieght on my foot over a month ago and it swelled and bruised but I didn't go in because I didn't think it was broken. There is still a little red mark on the top of my foot. Sometimes there is a lot of tension when trying to move my toes and some pain that makes it uncomfortable to walk. What could i have done to it?