My son is 3 years old. He has been coughing for last 1.5 months. Actually I got cough after viral fever1 month ago . And till now he coughs mostly on morning after waking up and in afternoon after waking up. And when he  coughs it keep going on. Actually he has been suffering from cough and cold since birth. But  he recovered within 10-15 days with cough syrup. This time we have used 4 days nebulisation. And also montek l syrup. But still no improvement. Not get disturbed in night or sleep. Only after waking up but uncontrollable. Now what to try. Or should I use steroid or which medicine is good for nubelization. Any cough syrup suggested. While coughing hard he pull outside air with force and cough and cough.