First when you are suffering from celiac disease
the most important treatment which is required is GLUTEN free
diet which you havent mentioned. S avoid wheat, barley and oats thats it. Nothing else is required. Also strict gluten free diet has to be followed because even a small pinch of it will be harmful to you and will exacerbate your symptoms.
One thing I did not understand why you have undergone ERCP twice as this procedure has specific indications which you havent mentioned.IBS
like symptoms may be part of your celiac disease onlyAntral gastritis
may be be due to H.pylori for which you have already taken HP kit
So at last GLUTEN FREE DIET. Remain in touch