How long would a mid-foot sprain take to heal? i have had pain for over 5 weeks now. there is no swelling but the foot feels unstable and hurts after exercise.

Stress fracture?: The mid-foot is a common place for a stress fracture. It could be only a sprain/strain, but a stress fracture is possible. While there is commonly pain at rest, pain only during exercise can occur. Stress fractures are often not seen initially, so if there was a negative x-ray at the time of injury it should be repeated now. CT/MRI can help make diagnosis. Immobilization/casting may be needed.

Re-Evaluate.: Mid-foot sprains need to evaluated with a higher degree of focus. It is not unusual to have foot immobilized for 5 weeks followed by varying degrees of boots and walkers. If your foot was not evaluated by a specialist in mid foot injuries, then you need to find one, more sooner than later. This is one of those instances where it is better to over treat than under treat.