I've been experiencing a sharp left foot pain about once every 30 minutes. The pain lasts 1-2 seconds then is gone. The pain is in the same spot every time. Its on the inner foot below the big toe. It is startling

Try googling Reflexology, and find a "map" of your feet. Every place in your feet have a pressure point that is directly related to an organ or place in your body. Pinpoint where the pain is, and find out where that part of your body is. That could give you a clue as to what is going on. Then I would either go to a licensed Reflexologist, or your Dr. to see what could be happening.

You could also apply pressure with your fingers to the spot under your toe, hold it with your fingers for a minute or so, and see if it keeps on happening after that. :)