The treatment for you is RICE
Rest - do not walk or stand unless it is must.
Ice - apply ice bag or crushed ice round the clock.
Compression - tie elastocrepe ( pink color elastic bandage) medium compression in the day time and mild compression in the night time.keeo it for 3-5 days until pain resolves.
Elevation - keep the leg on 2 pillows kept vertically for next 2 day.
If need you can take anti inflammatory medicines ( the one which you normally take) for next 2-3 days.
Next Steps
watch it for 2 days. if pain or swelling doesn't reduce please show it to your orthopedic surgeon.
Health Tips
grade 1 and grade 2 sprains easily respond to physiotherapy.