~use elastic bandages (such as an ace bandage) to wrap your ankle.
~wear a brace to support your ankle.
~use crutches for walking till swelling
~keep your foot raised above your heart with pillows when resting or sleeping to reduce swelling.
~get plenty of rest and do not put weight on your ankle.
Still you don't get relief than visit physiotherapist
as physical examination /xray may be required for further investigation.
Do reply for detailed treatment plan.
Wishing you a good health.