When to call ped about a cough?

A

My 22 month old has had a cough for a week now that keeps him from napping and sleeping at night. Poor thing is exhausted and so am I. We only cough a tiny bit during the day which brings me relief but when he lays down, he’s hacking up a lung and wheezing!! It causes myself SO much anxiety. Must be post nasal drip but how long am I supposed to let him suffer? Crib mattress is elevated, he has a humidifier and we suction his nose. 😭