I have been feeling cramping feelings in my left foot for the last few days. Today I noticed that when I was walking barefoot, I could feel the floor with all of my foot. I took a look at it and the whole entire foot is now in contact with the floor. It is just my left foot too. What do I need to do now? Do I go and buy arch supports and use them for both feet or just the left one? Also, is this something I need to be concerned with?