Lucylovesnormal if you’re not taking small sips to slow your rate of Water intake, I’d guess that’s a very likely cause of your stomach pains. A gulp of Water hitting your stomach, especially if you’re not careful to eliminate swallowing air, is likely to be too much and cause discomfort. By stretching your stomach out, as it empties your hunger feeling can be more intense as well. Just because you “can” drink water fine, doesn’t mean you should. Plus drinking and eating slower makes it less torturous because you can do it constantly for like 40mins per meal. Btw I don’t understand you wanting to eat half as much as you did before… you had around 80% of your stomach removed… I don’t know your personal situation but halving your diet is unlikely to be enough to maintain a healthy weight. With this type of surgery our metabolism slows and that means we will forever need to eat significantly less that “normal people” to maintain an identical weight as someone who hasn’t undergone surgery. Your surgical team should have hopefully explained all this