For what you wrote, your ankle sprain is likely to be more involved thatn first thought. A common misconception is that an ankle sprain is no great concern. That is an incorrect assumption. If you saw a podiatrist or orthopedist initially, then go back. If you were seen at a minor emergency center or ER, see the above suggestion. You probably need a good ankle brace at the bare minimum. If you are still hurting, I might recommend an MRI.