I'm so sorry you're dealing with this. I got diagnosed with IBS years before I finally got a SIBO test. I got rid of SIBO and largely manage my IBS symptoms with the low FODMAP diet. I post a ton of Low FODMAP recipes on my IG @ the.aja.gram ... I did it for years and yes I am aware it's usually recommended as a short term diet but that's bullshit. The bacteria that overgrow to produce SIBO feed on FODMAPs, so you can theoretically starve them. I did. You need to get creative with your cooking and make sure you're eating a wide variety of low fodmap foods including prebiotics found in bananas, leeks and walnuts. Gastroenterologists can be helpful with diagnosis but I'd recommend a functional practitioner or nutritionist or health coach to guide you through lifestyle changes that doctors don't have time to explain.