When my son first had a small bowel biopsy that was positive for Coeliac Disease, we immediately put him on a gluten-free diet and after a while his symptoms disappeared. A new biopsy showed normal villi. After several years of this the doctor said he should have a gluten challenge. This meant feeding him foods containing gluten for about six weeks and then doing another biopsy. This was to see if the villi were again affected and if so he was to be considered to DEFINITELY have CD. Apparently there is always a chance that the first biopsy could be abnormal for other reasons, and to save a person from a needless lifelong g/f diet, the challenge is done. This was the case about 12 years ago anyway. I don't know if things are any different now. If you go gluten-free and become well, then you would know that you are likely to be a Coeliac. If you don't get better, you would then know to look elsewhere for the reasons for your problems.