Hi. Thanks for your query. Noted the history and understood your concerns. Celiac, chronic gastritis and gastroenteritis together and still not recovered fully in spite of gluten-free diet and no dairy indicate that you need further studies to know the additional or exact cause of your problems. Fever of low grade fever and inability to recover fully indicate one of the following reasons: Thyroid dysfunction, particularly thyrotoxicosis can raise the temperature of the body. Irritable bowel syndrome, meaning IBS in addition to the existing diagnosis as you are suffering from anxiety too. There can be accompanying infection and hence should be sought after. Hence I would advise you the following: Get the blood, stool and urine tests done. Contrast enhanced CT scan of the abdomen to see for any other problem. Blood culture when you get fever helps.