if you're able to walk on it and the swelling is minimal it's likely that you have a sprain that should be on the mend soon as long as you give it the attention it needs. first rest it. don't walk on it too much even if you can. that may cause an increase in pain and swelling. ice and wrapping your ankle with a compression bandage will help the swelling. you can take pain relievers as needed according to the directions. and keep your ankle elevated whenever you can. you should see slow but continuous improvement over the next few days. but don't hop back into strenuous activity too soon or you may suffer a setback. and of course if the pain ever gets worse or you're not getting better see your doctor. here's more info on ankle sprains. unable to walk torn ligaments.
mild lateral soft tissue swelling. no fracture. how bad of an ankle sprain is this?