My brother was just diagnosed with celiac disease, had endoscopy, blood comp panel was positive too. I too had developed some symptoms, diarrhea, upset stomach...went to a doctor...said I should go on an elimination diet, no gluten, milk, dairy, sugar, caffein, etc. At this visit, she also ordered a blood test for the celiac disease panel. So, I went on the gluten free diet, 12 days later went for the blood work.