DD1 did this for about a month before DD2 came along it was horrible so im sending some
I would get her up and sit on the lounge with her until she calmed down and then put her in bed but then she would wake up and expect to go onto the lounge everynight.
so I just gave up on sleep for a few nights and just kept going back in to resettle her in bed i think she just realised after a few nights play time was over.
She still wakes once or twice a night but we just have to put her dummy back in and lay her down again.
it was hard because her room is right next to DS so he was getting woken all the time.
Im sorry I dont have any helpful advice its so hard to function with no sleep
I really hope things improve soon