Well, I had my gall bladder out and for a long time I would have stomach cramps and diarreha after every meal just about. So I stopped eating breakfast so atleast I felt fine until lunch. My doctor put me on Reglan, to help but it had odd side effects for me although it worked. Now I take Motilium, but its not FDA approved and comes from New Zealand, but it has stopped the cramps etc. If you haven't had your gall bladder out, you need to probably get it tested. My ejection fraction was 0% when I had mine out and it should be around 32% at a minimum. I would try to see about getting that test first. Not sure about the B12, but good luck!