6 months ago I slipped while walking down a step. My foot bent underneath me so that the soul of my foot was parrel to the wall. It was discounted for a few weeks and swollen greatly. There was a very noticable buldge right on my ankle bone. There was pain but I could still walk. To this day the ankle is still swollen with a buldge on the ankle bone. Every step I take there is a cracking acompianed with slight pain. Pain comes with prolonged use as well. What do you think is the matter?