Most common causes of Post Cholecystectomy Syndrome (PCS)?

Approximately 2 years ago I had my gallbladder removed. Things were great for a time, but over the past couple of years many of the recurring symptoms (mild pain after eating which radiates to the back, burning sensation in my upper abdomen) have returned. My doctor just recently ordered an MRCP  to check for the cause of what's seemingly my PCS. Needless to say, I hit Google as soon as he ordered the test, and after an initial period of major fright (the first results included chronic pancreatitis and pancreatitic cancer), I discovered a large number of possibilities, including:

* Irritable bowel syndrome (IBS)
* Bile gastritis (inflammation of the stomach)
* Gastroesophageal reflux (GERD)
* Hypersensitivity of the nervous system of the GI tract
* Abnormal flow of bile into the GI tract after removal of the gallbladder
* Excessive consumption of fatty and greasy foods
* Painful surgical scars or incisional (scar) hernias
* Adhesions (internal scars) following surgery
* Retained gallstones within the bile ducts or pancreatic duct
* Stricture (narrowing) of the bile ducts
* Bile leaks following surgery
* Injury to bile ducts during surgery
* Infection of the bile ducts (cholangitis), incisions, or abdomen
* Residual gallbladder or cystic duct remnant following surgery
* Fatty changes of the liver or other liver diseases
* Chronic pancreatitis or pancreatic insufficiency
* Abnormal function or anatomy of the main bile duct sphincter muscle (the “Sphincter of Oddi”)
* Peptic ulcer disease
* Diverticulitis
* Crohn’s disease or ulcerative colitis
* Stress
* Psychiatric illnesses
* Tumors of the liver, bile ducts, pancreas, stomach, small intestine, colon, or rectum

So my question is, what are the most common causes of PCS?

Info:
- Male
- Age 31
- Social drinker (once a week, usually less, either beer or red wine)
- 220 lbs
- diagnosed with GERD, Gastroparesis (both of which all but disappeared after my gallbladder surgery).

Thank you for any information.