I think my DD might have reflux, but not 100% sure. She's 5 weeks and formula fed. While she's sleeping, she'll start swallowing or moving her mouth which will then wake her up and I can see milk in her mouth. Sometimes she'll spit it up, other times she'll swallow it. She also coughs frequently and will sometimes make a gagging/drowning noise while eating. Is this reflux? Something else? Suggestions on how to help her??