Just that.... did your newborn sound congested, and if so, what was it due to?

My newborn has been congested since about day 13 of life, which was of course about 5 days after LO1 started with a cold/virus and about 3 days after he was seriously quarantined (he stayed at my in-laws house.) I imagine the congestion is due to being exposed to his cold, and I already took her into the dr and they didn't seem too alarmed bc there were no other symptoms and her lungs/breathing sounded good. I posted a separate thread about it a couple days ago.

I'm wondering though if maybe I forgot how weird newborns breathe and/or maybe it's something more physiological rather than contagious? My DH is has been congested his whole life due to asthma, allergies, nasal polyps, and a deviated septum.

ETA: Her congestion seems positional - worse on her back, better on her side or tummy and/or while nursing.