Possobility of gall stone is almost nil because of two reasons.
1... Your surgeon must have definitely investigated you for the possibility of stone in bile duct before the surgery.And after the surgery it can't come
1... Even if stone is there,then it should be a large stone and it would have caused serious obstruction long back and would have resulted in ascending cholangitis
or pancreatitis( both are serious emergency conditions).Small stone would have passed to duodenum.
Your constant ache under right rib could be due to post cholecystectomy
Your current abdominal pain
and raised bilirubin
could be due to acute hepatitis
Please discuss with your doctor about all this.