Memehegan, thank you for the very kind reply.

Like you, I think there must be some type of bacterial overgrowth - yeast infection.

I was on Zantac a few years ago for gastric reflux and with the lowering of acid, by this drug, that might well have enabled the growth of any bad bacteria.

Like Super Sarah suggests, I have taken good interflora bacteria in the form of supplements, but to no avail. I even begged my doctor three years ago (after my second endoscopy) to let me have triple therapy in the hope that the problem was caused by that h. pylori bacteria...but again, the medication had no impact. So it can't have been h. pylori causing the problem.

The fact that I have always a white coating on my tongue, points I suspect to some type of bacterial infection...eg yeast. But here's where I am stuck....
surely a yeast infection would result in me getting cankers, sores on tongue etc? I have never had that problem.

I am stumped.

I just sit down and cry at night.