Someone below already mentioned this. There is a diet called Fodmap. and you can look it up online. The idea is to eliminate all the foods most likely to cause inflammation, get relief, then add them back one at a time. For now, stick with simple, bland foods. Bananas and applesauce are good starter foods, though you might have a problem with sugar, even natural fructose. Sometimes, glutons in wheat products can cause some of these symptoms too. Try eliminating glutose in you noodles, and breads. Some people have trouble with lactose. These things can be tested for in a GI office with a breath test. Also after or during antibiotics, it is helpful to add in some of those good bacteria that help us digest foods with Greek yogurt, or Kamboucha (the pineapple is really good). Look up a list of foods and spice that are anti-inflammatory and try to use those. Antibiotics kill off all the bacteria - good and bad. I would bet the NP will have some good suggestions.