Kind of a little worried. My almost 6 week old daughter swallowed a little bath water when I was rinsing out her hair last night. I didn't see it happen, but after I lotioned her up & changed her, she spit up some water. Now today about an hour ago, she spit up a little more water. I'm noticing her sucking in her stomach with every breath and also flaring her nostrils sometimes while she's sleeping. Is this normal and maybe I'm just noticing this stuff more frequent because I've been studying her like a book being overly worried? Or could this be something serious?