Need support rapid breathing

Bree • 25 years old. Madly in love with my king 💘. Have one healthy baby boy who just turned two and one on the way! 🍼👶 2 angels in heaven 👼👼.

I noticed my 3 week old was breathing really fast and he's had some congestion. Took him in to ER because I was counting 80 or more breaths per minute. No RSV. Negative chest xray. Perfect oxygen and all other vitals. They sent us home. I'm just worried. Has anyone else had rapid breathing issues and baby ended up okay?

Concerned mama. Thank you!