HI.
The most probable cause of pain in the right side of the abdomen are as following:
There are more chances of
Liver abscess in your case.
Cholecystitis- due to
gall stones or
gall bladder infection and / or stones.
Or stomach ulcers or Liver swelling.
This is best diagnosed on a simple test of
ultrasonography.
Return back to the hospital, get this and other blood tests for Hb, WBC, liver function tests, amylase, lipase, kidney function tests and blood sugar.
X-ray of the chest to see that the lungs for pneumonia and
pleural effusion.
Upper GI Endoscopy if the ultrasonography is normal.
The treatment will depend upon the findings,
If there i sliver abscess, this needs to be aspirated under ultrasonography guidance if there is liquidation.
If cholecystitis , surgery will be the best option, rest of the problems can have medical management