K.H.
Of the 4 responses that you've had so far, I agree more with Susan and C'Ella H. Perhaps something has happened that you may not be aware of.Are all her teeth in? Could she be getting her 2yr molars?
Also, the thought of CIO with a limited or non-verbal child (however vocal they may be) -- breaks my heart. Their chief form of communication is crying. I am of the firm belief that babies and small children do not manipulate. I believe they simply don't know how. They know what they want and how they feel, even if they can't label it yet.
I would be more inclined to help your daughter feel secure in your love for her and safe knowing that whatever might be freaking her out at bedtime that Mommy and Daddy will hold her and make it alright. Yes, some kids need/want this kind of reassurance 'til they're 4+ years old. Personally, my response is 'so what' - they grow up so fast. Why speed up the process?
hope you find some of this helpful. Good luck with sleep :-)
K. H, mama to
Catherine, 4yrs -- in our bed 'til 13mos, in our room much longer and even now on some occasions
Samuel, 1yr - in our bed, still nursing at night b/c of pain from teething