GERD or Possible H pylori

  Hi, I was diagnosed with Celiac Disease back in July of 2008.  Diagnosis was by blood but I had biopsies taken from Colonoscopy and Endoscopy.  I have been eating gluten free for almost two years now and I am feeling worse.  I have lost 60lbs since July 14th 2008.  I am 6ft2 now 172 lbs I was 233 lbs.  I have stomach pains after I eat, excessive fatigue, muscle loss, dizzyness, swollen glands.  I am wondering if this could be from an h pylori infection.  I have excessive belching all the time its rediculous.  Before I got sick I never had this problem unless I drank a carbonated soda.  Now, I am basically so weak and afraid to put anything in my mouth for how its going to make me feel.
  I was tested for h pylori at the time of the intial endoscope and it was negative.  That was two years ago though and I asked my gastroenterologist what he though and he said that if he tested 8 out of 10 people that they would test positive for it.  Well if that is true there must me a marker for what is acceptable and if its abnormally high I would think something needs to be done.