See your doctor. Lower leg and foot pain is often a symptom of diabetes.
I also have this problem but I was measuring the sugar in my blood in some pharmacy store couple of months ago and everything was OK. Now, after two months I still have this foot pain, sometimes I feel like my leg is made from woods if you can understand what am I saying.
I believe that this is because of poor circulation but I am not sure anymore since some blood tests showed that there is nothing wrong with me.
That is why I really don't know what to do.
I really hope that this has nothing to do with diabetes.