Baby no. 2 is due in January. I know that I want to co-sleep as we will all get better sleeps, but what should I do about covers/blankets, since babies should not be under the duvet? DS was born in the middle of a very hot summer so we were fine with a light blanket, but I get really cold in the winter. Should baby be on top of the blankets in a sleeping bag? What have others done?