Hello girls! I just gave birth, we're 21 days old now, and there's cou…

Hello girls! I just gave birth, we're 21 days old now, and there's coughing without fever. Does anyone else have this? They say such a virus is going around now, I don't know what to do. And colic and cough... I'm really worried about my little one. What should I do? Called a pediatrician, says the lungs are clean, and an ambulance was called, everything is clean. But where does this cough come from?