I would be very concerned about that CRACK sound that you mentioned. I have had nerve damage in my back from an accident years ago that causes the sympotoms of neuropathy in my feet and lower legs. A neurologist called it something else that starts with neuro. About 2 years ago while working outside on an asphalt parking lot I was not paying attention to the angle of my right foot which sometimes angles outward due to poor prioperception (position awareness). I heard a crack in my foot. But I felt no pain. Later I took my shoes off and saw no swelling or redness. Months later I noticed a bulge on the bottom of my foot on the outside edge. Xrays showed that the long bone extending back from the little toe was broken and trying to heal itself back together. Now 2 years later the bulge is slightly larger and I will probably have to get surgery to do something about it. UGGGGG! Has anyone Xrayed your foot?