Have a 9 week old who up till now has been a pretty good daytime napper - getting more and more short now and waking after 20 mins or so and crying. She is totally exhausted and her eyes are always heavy but she refuses to sleep. Have spent all day with her in her cot in a dark room to try and get her at least one days good sleep in order to help her over this over tiredness but to no avail - she's still awake now from 3pm. We've tried holding her, rocking, placing in the cot while still awake, white noise, lullaby and still she refuses to sleep and just cries. She won't feed any more either so she isn't hungry! No idea what to do to make her sleep or how to get out of the vicious over tired but won't sleep cycle 