If mast cell stabilizers and antihistamines both help you, try the Autoimmune Paleo diet for 2 weeks. Your symptoms could be due to immune dysfunction and if so

If mast cell stabilizers and antihistamines both help you, try the Autoimmune Paleo diet for 2 weeks. Your symptoms could be due to immune dysfunction and if so will lessen significantly. Also steroid nasal sprays exist.