Cough, Fever. What can we do about it?

Consulted for: Baby Avyaan Kaul (Son) , Age: 2, Gender: Male My son is 24 months, 12kg, and catches chesty cough very frequently. We give him BroZedex LS Kid, Montair LC Kid and paracetamol for fever. We also used to nebulize him. He has all above conditions right now and we are giving everything except nebulization. We live in Denmark, where he goes to Daycare and catches infections very frequently. I'm always very upset and frustrated to see him cough. In day time, heis very energetic and ayful while coughing, while during night hes very lethargic and crying, develops a fever. Is there no way to quickly cure a cough and chest infection?? What can we do about it? Me and my wife are handling it alone and it gets very overwhelming. Everyone in Denmark says its very common for kids to have whooping/wheezing cough, but we get very upset. We avoid going out of our home, whoch adds to the frustration. Please help in anyway you can!  History of medical conditions: We came to Denmark