I agree with LAteacher in most respects. I was referred to a brilliant GI consultant In Scotland and went through the breath test/ rolling antibiotic programme. The thing that eventually fixed it for me was the FODMAP diet. It looks pretty daunting to begin with but it’s worth making the effort to adhere to it strictly for at least a year. I will probably never be able to come off it completely and I still make mistakes but my health is generally more stable. I try to avoid antibiotics because they cause other problems. Some fruits and vegetables aren’t on the diet sheet so I avoid them - apples, peaches, nectarines are out, as are cauliflower and most brassicas and potatoes. I also avoid gluten and lactose. It looks hard but it works.