My almost 3 year old (feb) has stopped sleeping through the night the last few weeks. She no longer naps in the day and wakes around 7am, ive been doing bedtime between 6 and 6.30pm - she wakes between 10.30-11.30pm and often plays in her cot for up to 2 hours til she falls back to sleep, we dont go in to her as shes not distressed. Any advice would be much appreciated!