When to call doc for cold. 11 week old

Vay • Mommy of Three ♥️ Laniya, Kayden && Kaylani

My 11 week old is coughing pretty hard . Sometimes she vomits with it. Sounds like she is choking constantly on it . Then she seems fine. No fever but it really sounds horrible and sound like she has a lot of fluid bouncing around idk how else to describe it