We had reached a pretty good place sleep wise with 13 month old DD. Into cot at about 730pm, she would usually wake sometime between 2 and 5am and come in to bed with us at that point. However a week ago she woke at 4am absolutely distraught, and ever since then has been a nightmare to put into cot awake or asleep. She will fall asleep in seconds in our bed- with either of us, not feeding to sleep, but wakes the moment we move her. I don't mind co-sleeping but I don't want to go to bed at 730pm every night! Does anyone have any advice?