Hi Dorothy,
I realise this is from last May, maybe you aren't on the site anymore or maybe you have found a resolution to your issues, or they have slowly improved ?!
Just read your post as suffering the same as you, feel at the end of my tether with the gastric issues. I am a life-long IBS sufferer, but nothing seems to be working in my GI tract right now. I get the odd day here and there where the 'stars align' and I get a normal day - but anything I eat usually causes burping and nausea even previously ok foods, my bowels are producing pellets everyday and I'm bloated, gassy and in pain. I am losing weight slowly but surely, purely down to a lack of calories.
Anyhow, if you want to share experiences with another sufferer - here I am