... They all seem to think because she is quiet she is ok... But she is never quiet... So just that fact is worrying me.

It is awful though, every time I go back in I feel like I am making more if it than I should but she is my baby and I just know something is up.
Make sure you tell them that, about her being quiet! That's as much of a symptom as anything!!

Good luck today hun. You are definitely NOT overreacting. You said it yourself - you know your baby.