Thanks for writing to us.
The X-Ray was already taken and the doctor would have taken the correct decision after reading the X-ray.
For pain the cause could be a hairline fracture
of rib/ribs/muscle contusion/Intercostal Nerve injury
in the respective region.
For Immobilisation "Strapping" is the only conservative remedy followed by opioid analgesics such as Tramadol
PO or Parenteral route.
In addition you may take rest in a propped up position.
In addition get a complete report by a Radiologist
. Consult an orthopedic Surgeon for a proper immobilisation .
Wishing you a speedy recovery.,
Dr Lt Cdr ASN Bhushan.,