Infant Having Persistent, Terrible Nasal Congestion Making Him Fussy Due To Nasal Blockage, Had Ear Infection, Mucus In Throat, Smelly Ear Wax

Hi, i have a 5 month old and since he was born, he has had terrible nasal congestion , at first his doctor said it was from when he was in the womb and it would clear up in a few months, and still every he wakes up crying because he cant breathe through his nose. He also has had three ear infections , and for the past few weeks, it has gotton worse, and he has mucus in his throat and pulls at his ears, also he has dark yellow, smelly earwax , last time we saw the pediatrician she said his ears looked fine, but he coughs and the nose congestion is out of control