Hi there, I think I have exactly the same injury - it was caused by missing a step in the dark - my heel hit the step and the rest of my foot kept going, causing hyperextension of the ankle. I could walk immediately after the initial pain subsided and there was only a small swelling below the medial malleolus, but two weeks later I still have a sharp pain when extending my foot and I can't sit on my heel. I would like to know whether you ever got a diagnosis for your injury and what the outcome was. I am not sure whether or not to go to a doctor as there is very little pain when I walk. I imagine it is probably a sprain and will get better on its own with rest and nonsteroidals, but if yours went on for two months I am wondering if it is a fracture.