If blood tests are ok, that is good because nothing is affecting you now, but if you are still concerned, you can get a sonogram of the abdomen for gallstones.
Many are asymptomatic, and show temporary elevations in bilirubin if symptomatic (epigastric rught upper abdominal pain). Even so, low fat diet, etc. Should be done before surgery since it may be too soon. See your doctor to plan it out.
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