My son was congested for several weeks and my doctor also said that he was fine. The only thing is is that he also started sleeping all day and night and my normally highly active kid became lethargic. The same pediatrician said again that he was fine. I took him to another doctor. My son had pneumonia. Thankfully with antibiotics he started showing signs of his true self within 24 hours. I took him back to his 'regular' pediatrician for the follow up and AGAIN he said that he had been FINE and he "found it hard to believe" that my son had anything. The other doctor promptly sent over the X rays. And the only things he said then was 'humph' I guess he did have. Trust YOUR feeling. Nobody knows your son like you. If he shows others signs , get a second opinion. My boy was less than 2 years old and could climb the drawers to get on the counter he was so hyper.Then all of a sudden he was sleeping the entire day, and only breast feeding. His doctor did NOT have the answer nor care.