Small Bowel Bacterial Overgrowth

A few years ago, one gastroenterologist suggested that in addition to my irritable bowel-C, acid reflux, and celiac disease, I was also experiencing SBBIO. No testing was done. The recommendation was to take a combo of Metamucil and Restoralax (miralax) to deal with the constipation and probiotics and a FODMAP diet. (Restoralax now exacerbates my irritable bowel symptoms so I have stopped using it, as did the Metamucil). I took a specific probiotic recommended by the gastroenterologist for two years and found it didnt do much for me. When I read about Small Bowel Intestinal Bacterial Overgrowth, I see there is a breath test and there are specific antibiotics used to treat this condition. I also have read that probiotics can also make the condition worse until it is cleared up. Anyone out there with this condition who has treated it and is feeling better?