Hey doc, my 3 weeks and 2 days son breathes like he has a blocked nose and he sometimes breathes through his mouth but theres nothing in his nose, sometimes he sounds like his snoring when he breathes, any advise?

Can see pediatrician: To show the pediatrician what's happening, the parents can make a movie of the shirtless baby's breathing. Show the face, chest, and tummy at the same time, so the doctor can see how everything moves during breathing. A minute into the movie, open the mouth to show how the breathing changes; and then a minute later, close the mouth to show how the breathing changes again.