I sprained my ankle/foot 3 weeks ago and i still get bad swelling, bruising and pain. what should i do?

Fracture: You might have a small fracture missed by the initial x-ray. Generally this is treated similarly to a bad sprain, but it takes longer to heal. Possible you haven't allowed enough time to rest the ankle. Going to physical therapy may help, and possibly repeat x-ray.

See doctor again: There may have been more to the injury than the doctor originally thought. Have it re-evaluated and get another x-ray... Sometimes things are more obvious at a later date!

You should visit: A doctor and have it checked out. At minimum, you likely should be wearing an ankle brace. If you injure the ankle and it is unstable and you continue to walk on it you are not allowing it to heal properly.

Have it evaluated.: Pain may last a long time following a foot or ankle injury. An x-ray can show if there is an underlying fracture. You may have a soft tissue injury if it is just a sprain and may have damaged the muscle, tendon, or ligaments in the area. Have it evaluated by a professional and get the appropriate treatment.