Five of our six adult kids or their spouses are Celiac, as are seven of eight grandchildren, all under age nine, so it's a way of life for us all. For starters, make sure yours is a 100% gluten-free household to avoid cross-contamination. A good resource for a wide variety of foods to eat and foods to avoid to heal the gut is Dr. Sarah Ballantyne's The Paleo...
DH is an unusual rash in that it is mostly symmetrical - down the centerline of scalp, stomach, back or on both elbows, shoulders, knees, thighs, etc., and yes, very itchy. And, yes, bothered by gluten in personal care products on your skin. DH is generally in combination with Celiac and Hashimotos, all autoimmune diseases. So if not already, have your thyroid...
Hi "milesmills". Congrats on getting a Celiac diagnosis early in your health quest! I, too, have had "shortness of breath" episodes since high school, 50 years ago. My mother had the same sensations. We describe it as feeling like the oxygen "can't get over a wall" and down to our lungs. Yawning sometimes helps as does taking a really intense deep breath...