I've got a carrier where my (7 week old) DS is held against me, facing in towards me with his head in my breast. However, he won't turn his head to the side and literally buries his head into my breast, so I'm constantly worried about whether he can breathe. His nose gets completely buried in my top/breasts.
I was thinking of getting a flat piece of cardboard and putting it between us so there's nothing soft for his nose and mouth to 'sink' into!
Also, his hands and feet end up really cold, though his face and body are really warm. He won't keep on mittens and socks don't seem to cut it - any ideas?