Grade 2 ankle sprain, with deltoid ligament, keep immobile?

I strained my ankle (like i stretched a muscle in my ankle), about a month ago, and it still hurts. I was on a walking cast, kind of like a boot with an open toe and it keeps it from moving. I don't have to wear the brace now, but I was on it for a while. I don't know how long it will take for your case, but I'd say longer than mine.