My son is 4 years old and suffering from prolonged cough since last 3 weeks. Already consulting Dr. And gone through full course of antibiotics as well asking with other cough medicines but still not much benefit. He use to have running nose day time and blocked nose while sleeping time. Also has gastric problem before sleeping. Cough serious just before sleep and after he awakes. Xray is done but no symptoms of pneumonia or anything. He lost approx 2 kg weight in 3-4 weeks. I'm kind of feeling like running out of option as what to do, please suggest