@of the valley- I'm sorry for your medical health. ☹ Have you tried Dramamine or meclazine for nausea? They are over the counter, and have very few side effects for most people. They are in the antihistamine area of medicines. If your main symptom is heartburn, and medicines aren't helping, you could try a baking soda and water mix. It acts on the same principles as some medicine, but because it is more basic, it works better for some people.
I hope you feel better soon.