@CC90, Welcome to the forum! Have you had a genetic test to look for Celiac genes?  You must have Celiac genes in order to develop Celiac disease.  If you don't have any Celiac genes, your doctors should look for another cause of your illness.   Intestinal damage from Celiac disease can be microscopic and patchy, especially in people who haven't had symptoms for long.  Gall bladder dysfunction is common in the early stages of Celiac disease.  Gall bladder pain occurs on the upper right side of the abdomen.  Nausea and acid reflux often accompany.  These symptoms can be improved with supplementation of the eight B vitamins, chemical compounds the body cannot make so must get from food.  Acid reflux, nausea, brain fog, gall bladder dysfunction are symptoms of deficiencies in B vitamins Niacin and Thiamine.  The eight B vitamins work in concert together, so taking a B Complex containing the activated forms of B vitamins is essential with Celiac.  Thiamine in the form Benfotiamine helps with the gall bladder dysfunction and brain fog.   The B vitamins are water soluble and easily excreted if not needed.  Taking B Complex and additional Thiamine in the form Benfotiamine is beneficial and safe.  Doctors aren't taught about vitamins, so the deficiency symptoms that you have are easily misinterpreted.  Other vitamins like Vitamin D and essential minerals like magnesium are often low in the newly diagnosed.  Supplementing with B Complex can improve symptoms.  

Welcome to celiac.com, @cc90! Had you been experimenting with a gluten free or reduced gluten diet prior to getting the TTG and the endoscopy/biopsy? If so, it would have skewed the test results, including the endoscopy/biopsy, toward the negative range. Was the TTG-IGA the only blood test run for checking into celiac disease? Did they also do a Immunoglobulin A (IgA) (aka, "total IGA") test to check for IGA deficiency? This should always be run along with the TTG_IGA test. If you are IGA deficient, then the IGA tests such as the TTG will not be reliable.

I'm really confused.  I've struggled with pain in right side of abdomen, head fog, nausea, acid reflix etc and have attended A&E on several occasions with no cause found (normal ultrasounds and CT). My GP ordered bloods.  TTG was 87.4 so I was referred for endoscopy.  Endoscopy was very traumatic but seemed worth it to have diagnosis confirmed.  Results have returned saying everything looks normal (7 biopsies taken) but they have arranged a repeat endoscopy to look at other areas of the bowel.  I really dont think I can go through the wait and traumatic ordeal again.  Is it likely I'm coeliac or not.  I was expecting confirmation but have been left more confused than ever.  

Do you have any issues when you eat corn? It seems unlikely that two different corn tortilla chips that are marked as gluten-free would contain gluten.  Have you eaten either of these in the past without issues, or is this reaction just on a recent bag?

When I get gluten sick I get pain in my stomach, exhaustion, migraines/headaches, pain in my gums. The same is happening after I eat those chips. The Gluten Assist enzymes are giving me relief. They were what stopped the vomiting yesterday.