White mucus after infection still?

Hello doctors, I had a viral infection on 14th June 2025. After that, I developed white mucus with  cough. I met my pulmonologist on 21st June 2025. My chest X-ray was done before the viral infection, on 9th June 2025 (attached below). The doctor prescribed me Cetirizine (antihistamine) and Macbery DX cough syrup for 5 days. After taking the syrup, my cough improved. But I still have mild white mucus. Now I am not taking any medicine or using any inhaler. I’m worried because I don’t have asthma or cystic fibrosis, but during a skin prick test (done for another reason), I found out I’m allergic to Aspergillus fumigatus. I’m concerned that this remaining mucus could lead to fungal colonization. Please advise: Is it normal to have mild mucus after infection? Should I be worried about fungal colonization? What should be my next steps?