Have you been tested for celiac disease or wheat/gluten intolerance?
I'm being tested for that currently.  I have the same symptoms.

Hi I have the same problem as you. But I am in Canada and here family doctore hardly accepts u need to go to specialist. It bothers me alot since I have gas produced in my stomach as soon as I eat a small thing. I testes milk as my Family Doctor suggested and it has nothing to do with it! I love milk and I was sure it could not be that since I am used to drink milk for my whole life.
I am suspicious now about Biscuits! As soon as I swallow a Biscuit it happens to me. When I go to party at late night I also have a big big stomack. I even stopped drinking any any kind of drink with gas when I was a child. That time I noticed it brings me lots og gas in my stomack and I can not dance or move right after I drink Coka Cola for instance.
But now the problem is back with almost anything I eat any time.
Could u plz let me know if u have found any reason or alergy ? I am also suspicious if I should only probiotic products?
  

I have the same symtoms too, right now as a matter of fact and it is really worrying me.  I went to the emergengy room last night and they took...blood work, EKG, X-ray of my stomach and chest and a abdominal ultra sound, they also gave me an IV drip and put pepsid into it, it did not help, they discharged me and gave me a prescription for Nexium, which is not helping so far.
The ER doctor said that all the test came back normal but the ultra sound showed I have something in the way in my intestines,
with gas trapped in the same place, I don't really feel to much pain but it is very uncomfortable and very full and extended, I look pregnant but I am not. The ER doctor said to follow up with my family doctor and to have him order a cat scan of my stomach.  I am really worried, I hope it is not a tumor or anything serious, oh also I can't expell any gas for some reason, I feel if I could expell the gas I would feel a lot better. Well I don't know what else to say but I am glad that I am not the only one with this problem. Please write me if you can help me.  Thank you very much. Good luck to all of you and good health.  :) ***@****

I have same symptoms.  Do you also have intermittent bouts of constipation, nausea?  I know you had a gastric emptying test to rule out Gastroparesis, but the symptoms you describe can also be Irritable bowel syndrome.  I assume you have seen  a Gastroenterologist?