My 2 year old son has had frequent difficulty breathing when he has had colds. He experienced chest retractions and below average oxygen levels. He was seen at the ER 3 times and given a nebulizer and steriod. When he was discharged they gave him the diagnosis of Reactive Airway Disease (RAD). After the 3rd time I requested to see a specialist. In the meantime he has been taking Singular on a daily basis. What should I expect to happen when he visits the specialist? Is he going to have to take medicine forever? Will he have asthma??