The upper part of my left foot just started to hurt. I can walk fine. It hurts whenever I bend my big toe up or down. And you can put your finger on the sore spot (on top of the foot), and when you move the toe up or down, it feels kinda.... squeaky? I know that sounds stupid, but, it does. The other foot does not feel like that . What the could this be? A strain, sprain, broken bone, torn something? And how long should I try wait before I call the doctor?