It may be due to ligaments strain,?
Please get ice therapy for 20 minutes thrice a day for 15 days, ultrasonic therapy.
Take heel cushion during walk..
Avoid jerky movements.
.
Next Steps
Don't worry, it may takes times near about 3-8 months,.
Please get an M. R. I done of ankle joints.
Health Tips
Contact nearest physiotherapy or me.
Thank you