2 months of fatigue, phlegm in back of throat, gagging, on proton pump inhibitor, nasonex, (mometasone) what else can help till i get my egd ?

Post nasal drainage: Consider seeing an allergist or ENT or having a ct scan. Fatigue with drainage might be due to allergies or chronic low-grade infection. Also consider irrigating your nose with a sinus rinse kit by neil med. These are in virtually every pharmacy now and can help you clear secretions. Avoid antihistamines. These make infections last longer. Does food stick? You could have eosinophilic esophagitis.