my son is 17 and been given a blue and brown inhaler as suspected asthma. No peak flow tests done yet. He’s started coughing after a bonfire on Friday and not sure if this is asthma or not. Coughing for 3 days and breathless but not really bad and no wheezing. Chest tight in morning but improves with inhaler. Oxygen fine and pulse rate high at around 100-110. Using both inhalers for the last few days but feeling exhausted from coughing. Not sure what I’m meant to do. Any advice and experience with this?