Price is the treatment for ankle sprain. But cautiously get a x ray also done as you say pain is not reducing
Might be there is ligament tear, you will need plaster cast for 4 weeks, if its 2 grade tear. Grade 1 is managed with Price. prevention, rest, ice, compression and elevation.
Next Steps
X ray as soon as possible.
Health Tips
icing and crepe bandage till you see your doctor.