Our bedroom is getting down to 14/15 degrees at night.8 week old DD wears a vest, pj's and a 2.5tog duvet. The room starts around 17/18 degrees and she only wakes up twice for her feeds. Is this too cold? I don't want to put the heating on all night because of cost, because her bed is next to a radiator (no other option), because then the room will be way too hot and she is a warm baby generally and because its only October its going to get a lot cooler! Is this ok or should I be adding blankets?thanks!