You might also be sensitive to other things while you are healing. Dairy, for example. It won't harm you from a celiac standpoint but is inflammatory and could be bothering you. Have you been keeping a food & symptom journal? Might be worth it for a week to see if you notice something you are eating prior to the times you feel your worst. I hope you start feeling better soon. 

Someone recently recommended Superfoods for looking up recipes free of allergens or intolerances.  It's a web site but there's also an app.

Open Food Facts is a free food database: https://world.openfoodfacts.org/discover  There's an app to access it which is also free (with no in app commercials).   You can use it to look up information about foods such as ingredients, Nova score (to help avoid ultra processed foods), environmental impact and nutritional scores, allergy related information and more.  It can scan a product's barcodes and bring up relevant information about that product.  The project relies on volunteers to share information about products.  We can add information on our favorite gluten free products to share with each other.  It has several gluten free items in the database already:  https://world.openfoodfacts.org/cgi/search.pl?search_terms=gluten+free&search_simple=1&action=process  I think it could make a great tool for people with celiac. 

You could try white willow bark, but make sure it's in a safe dosage range.  Herbs aren't regulated the way prescriptions are.  White willow bark works a lot like aspirin but is often milder on the stomach.  I used to use Nature's Way white willow bark.  I was told it was corn free at that time.  Double check with the manufacturer to make sure it's free of any of any allergens you're concerned with.

Be sure to bring this up with your doctor, as there is always the possibility that you've got other issues besides celiac disease.