I must say that the Fodmap diet changed my life. I had suffered from IBS for 2years and was very frustrated , when a dietician put me on the diet. You will need some time to adjust to it as it's a complete change in terms of your eating habits, with lots of new restrictions, but when you get used to it you realise that you can still actually eat a lot.
It helped with my bloating massively so even if you don't loose weight, you will still feel better in yourself xx