Asthmatic suggestions. Chest cough!

Have asthma since 2015 but never get the serious types of attacks Have been in the lockdown for the entire period with weekly once visit to the next door shop for essentials No fever No cold No running nose However have been getting very frequent nasal blockages which then panic me into thinking I am not breathing too well No panting or such but just feel uneasy Even nasal drops don't clear the congestion Strangely when I workout I don't feel any breathing difficulty Even doing some breathing exercises give me slight relief Have a slight cough but no coughing I am very prone to cold and dust allergies Sudden climatic changes cause cold Strangely with such colds I used to get mild fever but for the entire Covid outbreak I have never experienced a bad cold with fever( Hoping that's good) Earlier I used to get heavy chest congestion for which I used to use forecast and that would solve my problem However now I am not having heavy chest cough