II'm a bit late coming to this thread so I hope you are feeling much better. The only thing that occurred to me was maybe it is Metformin? I used to have terrible bouts of nausea, vomiting and diarrhoea when I was on it. I had also read that it can make you sensitive to certain foods, so it might be worth monitoring to see if some foods are aggravating this. One tip the dietician gave me was to eat something every two to three hours, which really helped settled the nausea. The other option is something my GP thinks I might have, which is gastroparesis. This is a complication of diabetes where there has been damage to the nerves and muscles in your stomach which slows down digestion thus causing nausea and vomiting. Hopefully it is none of these, and just a passing bug.