I work retail and stand on my feet for 7-8 hours for several days in a row. It's been a few months and from day 1 my heels on both feet have gone numb and hurt after an hour or so. During the last week I have been experiencing pain sour feeling and numbness in my left leg. I tried several different type of sneakers and shoes with no relieve. New leg pain occurred during an attempt with a new pair of sneakers. I do not have health insurance so a dr visit is out of the question. Any thougths?