DD is 12 weeks old and along with having a growth spurt has started waking after her bedtime feed. She was going down very well at night - 8pm asleep and slept through. She is now waking exactly half an hour after she goes to sleep - like clockwork - every night. She makes the most bloodcurdling screams and it sounds as if she is being murdered. She has a small feed at the 8.30pm waking to settle her - then promptly wakes again at 9pm. She suffers from wind quite a bit and I was wondering if it is wind resulting from that last feed that is causing her to wake ? Or if this is standard growth spurt behaviour and I just need to ride it out