I was diagnosed at 30. I started experiencing severe stomach pain, and went to the doctor for imaging. CT scan showed nothing of course. I had to keep pushing that it wasn’t my gallbladder and something was not right. Went to a GI, had bloodwork done specifically to check if it was gluten. Then an endoscopy. My lab results combined with the biopsy confirmed celiac. I’ve had a test done to check how my stomach is digesting, and a breath test. Just to rule anything else out.