Weird sound

jcm52289

My two month old is usually a really easy baby. She does however make a sound sometimes that freaks me out. When she's eating (and its only when she's eating), she'll make a sound that sort of sounds like she's breathing in too much air. Its hard to describe. She'll make that sound, spit out her bottle, make the sound a few more times, take her bottle back, and then she's fine. Its not all the time and idk if its something to worry about. I'm a FTM so I'm paranoid over everything!! Do any of your babies make this sound? I get nervous and then I think she can't breathe.