My 4 week old DD is feeding well, usually every 2 hours during the day and is putting on weight. She was full term and no issues. However at night she goes for hours in comparison without feeding. Tonight she fed at 10.30 then went down in her cot and I've ended up waking her at 3am to feed her because she hadn't woken up. Should I wake her to feed her at night or let her sleep? I feel like she would obviously let me know if she was hungry in the night but I'm too nervous to try it out (FTM of course). Would appreciate advice of anyone who's had a similar situation- I'm of course grateful that up to this point I've escaped the newborn sleepless nights!