Started as if flu but then Allergy? Help

Patient: About 10 days ago I had fever and cough. so university doctor gave me antibiotic and paracetamol almost a week i have used it and i was stopped fever but cough was as if getting strong. plus nose become runny and when i cough, yellow spit (similar thing running from nose) frequently appeared. so doctor diagnosed it as a J20.2, J01.8 which are seasonal allergy i suppose. my ear also started deafen as if water went in and when i give air pressure with my palm it becomes a little better but when i cough, it start deafen again. is it really seasonal allergy or flu or any other suggestions?