Sprains can be worse than breaks if you don't take care of them.
The retired paratrooper in me says suck it up and drive on,
The logical, sensible adult nursing too many old injuries says if you have to ride to keep your head right, ride slow and easy, and don't walk. Better yet, rest it and let it heal.
My wife has to have major surgery on her ankle next month because she sprained it bad and never let it heal, the ligaments kind of stretched to the point where they lost their stretchyness, as best I understand it.