Tests are not an end in of themselves.

They can be done wrong. They can be interpreted wrong.
We have the tests on paper, but really, most medical things don't always fit and often there can be rogue results.

Simple tests, like potassium levels can be very erroneous. This has a name called "factitious" results. False positives and false negatives abound in every area of testing.

Not too long ago Quest diagnostics admitted to having all wrong Vit D test results! They were using the wrong calibration.

So while it is important to rule out things, getting too upset in the beginning, can only make you feel worse on a day to day basis.

You might have a benign thing going on in your gall bladder, some stones or inflammation. That is one thing that test reveals.
This is very common... so I'd focus on that for now.
Stress is very harmful to PN symptoms, so keep that in mind.

All of us at one time or other have had this feeling, and gone thru testing anxiety. Once my Grandmother's doctor told her she had a spot on her lung... prematurely...before the films were totally dry and developed. She obsessed about that for a week and went back, and nada... all clear. It was totally painful to watch at home!