It sounds like you are still getting glutened. You say you travel for your job what are you doing for food when you travel? Can you talk to HR and explain the situation or possibly take sick leave while you get this figured out? If not can your doctors order a celiac panel for you and then get a blood draw done before or after work? That would at least give you a starting point for you and your doctor to start at.
Sorry you are going through this. I am going through something similiar as far as the exhaustion on your days off is concerned. I call them 'lost days' and it can make things very difficult. Hope you get some answers soon.