Foot Injury

I haven't been able to run all week because I hurt my foot on Sunday. I have no idea what happened but after my lunch digested, I dusted off my bike and went for a quick but hard ride. When I got home, got off my bike, and took my shoes off, my left foot hurt so bad that I could hardly walk on it. It was weird. I have no idea what could have caused it. My cycling shoes are locked into my pedals when I am riding so my feet never even move. Its Thursday and it still hurts to walk on. I am going to wait until Saturday morning and see if I can run on it then. If I can't run, I don't know what I will do. I guess all my racing goals for the summer will go down the tube. Oh well, we'll see what happens.