Hi there,
Since u r telling that injury is 4 days old and u r having severe pain, i understand that u haven't seen any orthopaedician till now. Atleast have an x-ray and show it to ur nearby Orthopaedics surgeon. u need to understand that even if its only muscular or soft tissue injury, rest is must for couple of weeks so that u can b fine later.
Next Steps
get an X-ray and meet an orthopedic surgeon