All of a sudden DD (21mos) is refusing to go down for night sleeps, she's chucking huge tantrums when I put her in the cot!! I ask her if she wants to go to sleep and she goes into the room herself happily and gets the dummies, but as soon as I lift her into the cot she chucks it!?what the? any ideas? she usually loves her sleep and is happy to go to in for her day sleep?
she is usually the type of baby who loves sleep and is happy to be put in her cot and for us to just go out and leave her to go to sleep.
I've even tried cuddling her til she's more tired but she won't settle on me, usually she won't settle with us either but last night she slept with us for quite awhile (about half the night) and while I don't mind doing it occasionally I'd rather not cosleep again as we will be TTC again soon and will cosleep with the next.

any ideas?? :/