Just a note that I do not work for the Henry Ford Hospital.
You clearly have had a comprehensive evaluation of your symptoms - including multiple endoscopies, CT scans, and an ERCP. Most of the major GI disease would have been found with the tests that you have had.
One consideration would be Sphincter of Oddi manometry - this can look for Sphincter of Oddi dysfunction that can manifest after a cholecystectomy. This is normally done in conjunction with an ERCP.
More specialized testing can be considered to look for the nausea and abdominal discomfort. This can include a gastric emptying scan, looking for gastroaresis as well as an esophageal motility study looking for esophageal dysmotility. This conditions can uncommonly cause some of the symptoms you are describing.
With the loose stools, again more specialized testing can be considered - including stool tests looking for malabsorption as well as blood tests looking for celiac disease.
These options can be discussed with your personal physician, or in conjunction with another GI evaluation.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.