Does anyone know about newborns needing to lie flat on their backs (sorry for sounding so ignorant)? I was told by the lady in mothercare that the baby would need to lie flat in the pram to start with. Are car seats ok for the baby to be in for a while e.g. going to the supermarket and being put on the seat part of the trolley in the car seat? I am usually there for an hour and then it would be 20 mins in the car as well - just a bit worried that the baby would not be flat for this time. Help!!