Dd's sleep has completely gone to pot for no obvious reason (not ill, teething, doesn't seem hungry) - I also have 3 year old ds and am really struggling. She seems to sleep much better on her tummy when on my or dh's chest so am considering trying to put her down like this in her cot.
She is 6 months, has good neck and back control (nearly sitting up) but can't roll. Is it safe at this age or should I still always put her down on her back?