DD used to settle relatively quickly but lately she screams for an hour, sometimes two, before settling.
I'm not sure if it is the 18 month sleep regression or just tantrums - she's quite vocal with her "no,no,no" and "more story". I've never yet managed to read enough stories to please her, suspect she just asks for more to postpone going in the cot? She settles to babbling periodically in between screaming, and if we go up to her it seems to make her angrier. If/when we go in she wants to come out of her cot - she'll stop crying if we pick her up but as soon as we put her down starts shouting for more stories and/or screaming again, stamps her feet and throws her blanket and bear out in protest.
Every evening is an endurance test - don't know what to do!!