I'm really worried about my 5 and a half month old son. Every morning he starts coughing and his doctor recommended using asthalin in a nebulizer three times a day. Last month, we even had to admit him to the hospital because of breathing issues related to his cough, and they treated him with a nebulizer there too. Can you help me understand what's actually going on with my baby? And is asthalin the right choice for him?