6yo DD has always been a good sleeper and once asleep will usually sleep from 8/8.30-7, she has never been one to fall asleep by herself so I've always stayed in the bedroom until she drifts off, which has never been an issue (she shares a room with 3yo DD).
recently she has been waking in the night, every night, either for the toilet or for no apparent reason, and she is unable to fall back asleep herself so will wake me to go and sit with her. She can take upwards of an hour to drift back off, flailing about, moaning about needing a blanket, a drink, a nightlight, anything possible to stay awake and I am exhausted. if I refuse she will kick off or lie in bed and cry getting louder and louder until I give in because I don't want her waking her sister.
we seem to be stuck in this cycle and I don't know how to get out of it, any advice would be greatly appreciated.