I've had pain in my ankle since january when i was kicked in the ankle at football. i get pain after exercise in my ankle and knee. what's wrong?

Ankle pain: Consider sprain, strain, bone contusion. Get good physical exam & imaging.

Get re-evaluated: Your goal and the doc's is to get you back to full speed. The original injury may be more than a minor contusion, and if it begins to change your movement, the instability can cause a change in gait which can also affect the leg. You need to get rechecked. Options for treatment may include conservative means such as bracing or if the injury is severe, surgery may be warranted.