Concerned about melanoma regression.

Is is possible for a mole to almost fade completely away from the side of my foot? I had a mole on the side of my foot that was there for as long as I can remember. I don't recall it ever looking suspicious or standing out to me as odd looking. I noticed a few days back that it has almost faded away completely. I'm not sure when it happened or how fast it happened. My derm said it looked okay, but brought up melanoma regression. I'm freaked out now being an overly anxious person.

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