I am suddenly having severe pain 6 weeks after spraining my ankle?

At the time of the sprain, I had severe pain with minimal swelling. Was placed on crutches until I could bear weight on it (two days). Had to use prescription pain killers for two weeks. Suddenly I have sever pain again and can barely walk. This pain is more towards the back of my ankle where as the previous pain was around the front and sides. I have not done any strenuous activity nor a lot of walking really as I am on vacation. Have been walking on flat ground. I some Aleve and is not helping...any ideas