I know I should just be grateful she sleeps 7-5:30 without waking, but I've got to be honest, she used to wake at 6:15/6:30 and that was far more palatable. Is there anything I can do to encourage her to sleep longer? I can't feed her at 5:30, then put her back down because I'll be back to work soon and she'll need to be up at 6:15/6:30. Any advise, other than to suck it up and be grateful it's not even earlier?! 