I used to suffer from this aswell. For about 4 years I was deathly sick and I had heartburn and vomitted frequently. It turns out it was from my eating habbits. I never ate healthy and my body had become deficient in vitamins and other nutrients. I went to see a naturopathic doctor and he got me set up with a health-food diet and lots of suppliments to take. After 4 years of being sick, my stomach is finally better. But I still have to what what I eat now.
For more info on why my stomach is the way it is, check out my personal blog at
http://depressionaffair.Blogspot.Com/
i hope you get better, it took me a long time to get better after all the garbage I put in my system.
Btw. I used to suffer from gerd aswell (used to take nexium), that stuff is really bad for you. Its just masking the underlying problem by stopping the production of stomach acid (which you need to digest food and kill off bacteria!).
I also had several tests done, all came back normal. Upper and lower g.I, 3 endoscope tests, ultrasound and 1 other I forget the name of. I was always disapointed when they came back normal because I wanted them to find something they could fix.
The only time I got any help was when my mom told me about a naturopathic doctor a friend at work told her about. I've been seeing him for 2 years now and my stomach feels great.
I can't eat wheat (flour), yeast, milk or any refined sugars anymore. Basically any produced food that comes in a can or box is bad. I only eat healthy food now (after years of eating pizza and junk food with galons of coca-cola). I used to smoke pot and cigarettes aswell and always suffered from anxiety and stress. All that crap put a big load on my body/stomach. I'm 22 now and i've been sick since I was 18. Only this year have I actually been getting better.
I would definately recommend you see a naturopathic and/or homeopathic doctor as it was the only thing that helped me.
Ps: i've suffered from emetophobia and agoraphobia since I was 13 (thanks to my dad). Read my blog for my life story if you're interested.
Pps: what are your eating habits and daily schedule like? Do you eat healthy? Do you exercise? Do you do drugs and/or smoke?
I hope you all get better as I have suffered from this and I am now 99% cured thanks to the best naturopathic doctor!