The last 3 weeks or so DD has woken almost every night, usually around 12-1am ish but sometimes a few more times within the couple of hours after that too. She wakes up screaming, shouting for us and sometimes for her dummy (4 of which are in her bed with her on a sleepytot bunny...). One us goes in straight away but even before we get there she is absolutely hysterical, honestly the noise is earsplitting. She then just cries and screams and says variously that she wants to get out of bed, she wants a cuddle, she wants water, she needs a wee (then often changes her mind and won't get out of bed to go the toilet - she wears pull up over night anyway), she wants her dummy (there in her bed...), she wants a different teddy that is downstairs...basically she will say something then switch to another request/delaying tactic. All the while absolutely screaming hysterically and refusing to lay down. Tends to go on about 15-20 minutes and usually she burns out of steam and then eventually will lay down and go to sleep, but sometimes she won't so we can end up repeatedly going in and out every few minutes for half an hour or so whilst she screams like she's being tortured.
We have no idea what's brought this on, whether we just need to ride it out, what we should do about it?! Has anyone been through anything similar and find anything helpful to calm them down? She is so hysterical it's awful.