My Lo still gets congested

Ta

Since my son was born, I have always noticed a little congestion. It wasn’t so bad when he was a newborn but it progressed and he is congested almost every night. We have a humidifier, I’ve done saline dropped, and I’ve propped him in his bed. I had a hard time with him last night because he would wake up from how congested he was. At his last appt, his doctor said it was normal and should grow out of it. He will be 6 months in a few days and I feel like he should’ve grown out of it by now. I plan on questioning it again at his 6 month check up. I was wondering if there’s any Lo’s that is also still going through this?