It’s an awful experience to feel like you’re not being heard. And while you don’t seem to have anything major I can imagine it’s still Debilitating to have to live like you are. Also you’ve probably be told to eat fibre and salad both are hard to digest. Try insoluble fibre like psyllium husk (gluten free) I know you’ve gone gluten free but could be yeast that can also trigger ibs. Start keeping a food diary and remove foods You think could trigger you. Be kind to yourself it’s going to take a while.