I don't think that Heather is against medication. It seems to me that medications don't work for everyone and that a lot of people find that a combination of things (diet, medication, exercise, etc.) work best. If you have a bacterial overgrowth, that seems like something that may not be managed with diet alone.
Did you notice any improvement being on the diet? I wonder if the medication and the diet in combination might not do the trick.
Hope you're finding more answers....it's so awful to be feeling bad and not know how to fix it!