My surgery was 50 years ago! I have had b12 shots monthly forever and take extra vitamin d and potassium. All necessary. A few months ago the diarrhea became so bad the I too felt I was destined to become homebound, due to the urgency and accidents. A new gastro suggested I take Welchol, a medicine for cholesterol that has the side effect of constipation. I started slowly- 2 pills per day, now at 4. My diarrhea is back to my "normal" and manageable. No urgency. It is a miracle. Not a well known cure- most gastros don't even know to try this. Read about it and suggest it to your doctor. It is an off label use for Welchol. It saved my life!