Hello
Thanks for posting your query.
Expiration and inspiration involuntary actions occuring in a cyclic pattern according to the oxygen and carbon dioxide content in the blood.it. Is controlled by the brain and receptors in the lung.Normally inspiration is longer than expiration but Whenever due to any lung pathology or airway obstruction the body is not able to expel carbon dioxide efficiently then the brain instructs us to prolongthe expiration phase so that the balance of oxygen is maintained.
Now in your sons case he has a wheeze and nasal congestion which signify airway obstruction so his body is compensating by takingprolonged expiration.
Please do not panic, because even in mild cold and flu or chest congestion in children , they may have discomfort during breathing and so they may have such expiration.
Its good that you have shown a doctor who has ruled out bacterial infection, so relax and please follow the doctors instructions and follow up check ups.
For helping your child breathe better you should apart from continuing his nebulisation and medication do the following.
1. Keep him well fed and hydrated with plenty of fluids and water and adequate rest
2.warm saline gargles and steam inhalations may help relieve his congestion and discomfort in breathing
3.for stuffy nose you can use nasal saline sprays as per your doctors advise
4.If possible,let him do XXXXXXX breathing exercise i.e XXXXXXX inhalation followed by by slow prolonged exhalation for ten counts , thrice a day .this wil improve his blood circulation in lungs
Even if your child does not comply with the above, a viral illness wil resolve on its own gradually so don't worry.
If your child develops high fever or pus in his sputum or worsened cough then take him to the doctor to rule out the need for antibiotics, though I dont think such need should arise if all goes well.presently the situation isn't worrisome.
Hope I have answered your query.
I'll be available for any follow up queries.
Regards

---

Hello XXXXXXX

Thanks for the follow up.

I understand your concern as a doting mother, and agree that in case of children it’s better to doubt than to neglect.

Every cold or viral infection may be of different severity and our body and immunity may deal with it differently each time. Probably your child is dealing with a severe form and so has these symptoms for the first time and the healing may be a bit prolonged.
I would say that you can wait for a week to ten days since his first symptom. If even after that there no relief, you should get him evaluated by your doctor again to rule out any need of antibiotics or alternative remedies.
Sometimes the cold may resolve in a week but just cough and breathing difficulty may persist for ten days, hence anything beyond that warrants evaluation.

Hope I have answered your query. Please accept my reply if you have no further queries.
Regards

---