This might sound really dumb, but I am starting to feel kind of odd about it. Basically, for the about the past week, off and on every 15 - 20 minutes or so, my toes on my left foot start twitching uncontrollably for about 5 minutes, then stop, then start again after 15 - 20 minutes. It does it at night, also. Is there any reason for this anyone can think of?