My ankle is like that right now. Just ice it. I have been and the swelling went down a lil bit. Just stay off it.
Levitate-lay on the couch with somepillows under your swollen foot, wrap a bandage around it like a tubagrip. The long bandages. You may want to have something to entertain you because you have to stay put for a good few hours. Walking will make it worse
Well if you think it is just a sprain I would ice it for a while. Something to handle swelling would be good, I will not tell you what as that makes me liable. If the pain or swelling gets worse in the next 12 hours you need to have it looked at.