Your milk has nothing wrong and that does not mean that your milk is less nutritious. Children will fall sick and that's very common. Chill out mama.
Have you brought him to see a doctor? Baby who are coughing usually tend to eat lesser due to excess mucus backflow which irritates their throat.
He may not be drinking well as he is blocked or his throat feels uneasy. how many days have this been going on?
4 days...
Anonymous