3 week old coughing after feeding

[GwendolineMaryLacey]

Initially I thought it was because she had a cold and the cough was part of that. But over the last 24 hours it's dawned on me that she only coughs partway or just after a feed (formula). It's a really painful sounding chesty cough that goes on for several minutes.

Feel awful now as we've all got coughs and colds in this house so thought it was just that. Will ring health visitors etc on Monday but in the meantime, has anyone come across this?

My four week old is the same. She had a cold at 2 weeks when the cough started and now, despite the cold being gone, she still does a little cough after feeding. Will watch with interest.