My 7 month-old son has scared me very badly three times now by doing this: he sounds like he's choking, almost like he can't swallow fast enough. Both times it's happened about 3 hours after he ate (he's bf). His eyes get real watery and his cheeks turn red. We keep him upright and pat his back and it only lasts about 10 seconds or less, but when it's happening, it feels like forever... Does this sound familiar to anyone? It freaks me out so badly.