Have you considered allergy shots? My Brother had severe sinus symptoms from seasonal allergies for years. He has been getting the shots for a little over a year and has seen huge improvements in his allergy symptoms.
Gluten & Sulfite Sensitivity, Multiple Food & Inhalant Allergies, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD (Lupus?), Osteoporosis, Anemia, malabsorption/malnutrition, etc.
Meds: Pulmicort, Claritin, Injectable Vitamin B12, Herbs, Nutritional Supplements, Essential Oils, Homeopathy.