Ghost pains from an ankle sprain?

In december i sprained my ankle pretty badly and i went to the doctors and they gave me crutches and an air cast and over a few weeks it healed. walking, running, and excercising had not given me any more problems with my ankle afterwards, but a few days ago i went to my physical and the pt was moving my foot around. ever since the physical my ankle has been hurting. after having a sprained ankle is it common to get ghost pains? and if so how long do the pains usually last? are there any excercises i can do to make the pain go away?