My left fiot feels swollen all the time and is sore to walk on what could be wrong when i walk it almost feels like it is broke but it is not?

Many possibilities: By the way, how do you no know it is not broken. A stress fracture is a crack in bone that can be the result of repetitive low grade trauma as opposed to a sudden injury. Can also be a number of other conditions including gout, infection, circulatory disorder or other systemic conditions. See podiatrist.

How do you : Know it is not? You may have a stress fracture. I would advise you get it x-rayed.