My 5 month old has been rolling over from back to belly for about 3 weeks. Every time I lay him on his back in his crib he will immediately roll over on his belly and sleep face down. He is in a pack n play with a mattress. I do have an owlet monitor on him because it just makes me feel better at night. When he wakes up his entire face is red including his nose. My first born did not do this until he was about 12 months old so I am new to this. Anyone else’s baby do this?