I broke my foot last year when I missed a step and fell on it. It started swelling immediately. Went to the E.R. (hospital is across the street and hubby got a wheelchair and pushed me there through lots of snow!) They did an xray and dr. told me there was a possible small break on top of my foot, so he put a temporary half cast on it and I had to go get a cast in a few days. Radiologist's report two days later said there were NO breaks. At the dr's where I got my cast, they took another xray and even I could see the break, which was not where the E.R. dr. said it was! He also showed me where there was a "chip" (expulsion fracture) on my ankle. When I got my cast off, the dr. sent me for an MRI because of the pain in my ankle. Found out there was a break in my heel bone too, just under the ankle bone on the inside. He said it didn't set together exactly right, so it will probably give me problems and require surgery to fix it at some point. I was amazed at how hard these breaks were to find and diagnose by professionals. Good luck with yours!