I've been BF for 16 weeks, and for the last 3 weeks baby keeps waking up every hour from 3am. She goes to sleep about 7pm and then thinks it's time to wake up! I've been told to try formula at her 11pm feed as it sits on their tummy longer... I'm starting to feel that it could be a good idea as sleep deprivation is really starting to take its toll, however I feel really guilty to make baby change to Formula purely so I can sleep. Has anyone else done this and has it worked for you? Thanks (confused)