Hi my 6 month old has been through some sleep training lately and it has worked great. She has a good bedtime routine and will go in her cot awake after her last bottle and put herself to sleep after about 8 mins. She was sleeping 7-7. Lately she's waking between 4.30 and 5 and is wide awake. She's not crying but thrashing around wide awake for at least an hour. She'll whimper after a bit. How can I get her to sleep longer again. I appreciate that she's just slept for around 10 hrs straight but would like her to wake later, about 6.30-7.