I am suffering from cough and congestion from five months and having tickling irritation in my throat with sputum reflux with breath and left sinus hazy. It feels cough is going back from the throat sometimes. Every test done is normal but left sinus comes hazy. Ige test was 900. Please response me what is it and how is it cured. My ent specialist says it' s allergic. I am diabetic too. But nowadays it' s controlled with fasting 98.