Years ago I watched the TV show Mystery Diagnosis and the condition was Habba Syndrome. This is
due to a dysfunctional gallbladder which produces an abnormal amounts of bile. Symptom - chronic diarrhea. The treatment is bile binding agents such as
cholestyramine (Questran).
So I figure this is the treatment you need as well and had a quick look online and to no surprise found the info below...
From Mayo Clinic...
"In most cases, the diarrhea stops soon after the surgery. Rarely, it may last for years.
The cause of diarrhea after gallbladder removal isn't clear. Some experts believe that it results from an increase in bile, especially bile acids, entering the large intestine — which may act as a laxative.
Treatments you and your doctor may consider for controlling your diarrhea after cholecystectomy include:
Anti-diarrheal medications, such as loperamide (Imodium A-D)
Medications that impair absorption of bile acids, such as cholestyramine or aluminum hydroxide"
I would demand to see a specialist and have the appropriate imaging done of pancreas, spleen and stomach.