Need advice on severe ankle sprain treatment?

I'm sure you probably already are, but if not, take Ibuprofen - it has stuff in it that will reduce the swelling. Also, keep icing it, and wear the brace just until it gets healed. (If you keep wearing the brace when your ankle is healthy, you will make your ankle weak.) Avoid activites that cause pain or limping in your ankle. Use crutches until you can do those activities without it hurting. When you're just relaxing and sitting down, elevate your foot above heart level. Just put it up on the couch arm or another chair or something like that. Also, if you think your doctor is misguiding you, go to some other doctor to get a second opinion. Good luck and get well! :)