I recently went through the flu also...Called my doctor right away because I was so nauseated but could not vomit. He told me I would no longer be able to vomit from below the band. I ended up in urgent care with severe dehydration and they gave me anti nausea medicine. That is what I would recommend if you ever get sick. The two bags of I.V. and the medicine made me feel like a new person. Also, my doctor was right I was never able to vomit. Which I think is what probably caused the severe diarhea.