My son was on his play mat in the living room when I went to go wash his pacifier in the kitchen which is right next to where he was. I heard a weird sound and then heard it again (it was like a grunt) when I went to go check on him he was on his tummy face down. He’s almost 6 months old and I know he can lift his head up and turn it because he sleeps on his tummy sometimes at night because I can’t stop him from turning over. He seemed to be ok, he took his bottle and is now napping. Do you think he’s ok? I’m worried he wasn’t breathing and I don’t know how to tell besides checking the color of his lips and nail beds...