After my 6 week old son finishes eating he breathes different. It's like he's gurgling or has fluid in his airway. It doesn't seem to bother him and his color is still good but it's after every feeding. He's not spitting up anything crazy and  It goes away after a while. His breathing has always been loud which the dr said is because his airways are still small and they get congested easy and he even said his breathing is normal but it just seems so strange to me. Any other babies like this?