Have you told your general doctor? I have no medical training, but it sounds like you may have a condition called Gastroparesis. I was diagnosed with it in January. Read about it and if you think you might have this ask your doctor for a Gastric emptying test. (That's what I had to do and they diagnosed me). The drugs for Gastroparesis are Reglan, Azithromycin, Domperidone, among others. Talk to your doctor.
Good luck.