Chronic fatigue, muscle weakness, diarrhea, and brain fog years after gallbladder surgery. any ideas?

Let's talk diarrhea: First define the problem (do you have soft or frequent stool?), circumstances under which diarrhea developed (malabsorption, pancreatic maldigestion, food intolerances, stressful times, exposure to ill individuals, food poisoning, ischemic gut, inflammatory colitis, after cholecystectomy), severity (stool volume, dehydration, blood, night-time awakening, weight loss), & duration.