Thank you for the query.
Your symptoms are most likely caused by stones in the bile ducts. Adhesions which has appeared after the surgery are also possible.
I suggest you to have blood work, liver tests (AST,ALT,GGTP,AP), amylase
, urine amylase and abdominal ultrasound
. If stones will be found, ERCP procedure will be necessary and will cure this conditions.
If no findings in this tests, abdominal CT should be performed to see if the pancreas
is fine and if there is no other things inside the abdominal cavity.
Hope this will help.