I've got a baby that I'm bottle feeding she's only 4days old and had been taking to it fine. However, I noticed today after feeding that she was wheezing. I tapped her sides to get her to cough, which she did but I can't get her to cough all of it up. She's whining softly when she exhales along with with whistle sound to her breath. What can I do to help her? Should I just keep Patting?