Well, slight exaggeration, but it definitely feels like it at the moment.
DTs are 18 months, DD 3 years; prior to their arrival she slept well with the odd week long sleep regression but generally managed 7-7 most nights. Now she's up three or four times a night, sometimes just needing to be tucked in again, sometimes inconsolable for hours. She often comes screaming into our bed, but doesn't sleep and fidgets for up to an hour or so until we take her back to her own bed. Then she'll sleep.
Meanwhile the boys will take it in turns to wake regularly from about 3am onwards. A quick cuddle works to settle them for another 30 mins, then they'll scream again (getting angrier and angrier) and eventually wont be left at all. They don't usually wake each other and alternate their own wakings, so some nights there can be as little as 10-15 mins without someone crying.
We're going mad with sleep deprivation and just need some ideas as to what to do. Do we need a sleep consultant? I know there's a major sleep regression at 18 months, but wtf is going on with DD?