You seem to be suffering from Postcholecystectomy syndrome (PCS) which means the presence of abdominal symptoms after surgical removal of the gallbladder
Symptoms of postcholecystectomy syndrome may include:
Upset stomach, nausea, and vomiting
,gas,bloating,persistent pain in right upper abdomen and happens in 10 to 20 % of patients after gall bladder
While 50% of cases may be due to biliary causes such as remaining stone, biliary injury, dysmotility and choledococyst,the remaining 50% are due to non-biliary causes.
You should consult your surgeon and try to get endoscopy
done to rule out acute gastritis
and look for any biliary causes by getting an MRCP or ERCP done.