My baby is almost 20 weeks. She goes to sleep at 7pm like clockwork, no bother, settled nicely in her cot after her bath and bottle. But that's where the bliss ends. She will NOT go back down after a night feed. She wakes, cries, feeds, falls asleep but then the second I lay her on her back she screams. She settles pretty much instantly when I pick her up. I've tried the wake to sleep idea but most times it's really hard to get her to actually wake, she just cries with her eyes shut. Help!