And probiotics!
My baby got a cold around 2 months. She had some congestion and a little green discharge in one eye. Made sure to use the nose sucker, wiped her eyes regularly with a warm washcloth and just monitored her for a fever. She never got one and just resolved in its own.
My 2 month old at the time what I thought was a cold ended up being RSV. 😅 we just suctioned and saline the nose. My older two caught a cold and turned into pneumonia and my youngest caught RSV from that.
Saline and sucking out the nose before every feed and before every nap and bed time all you really can do