Sleep disruption/regression and starting nursery

Hi, my one year old has started settling in days in nursery in the last two weeks and this seems to have come with a terrible sleep regression. She is wide awake and chatting for hours and hours at night and just can’t settle herself. It’s like she is hyper and can’t relax. I didn’t really think it had anything to do with nursery until we had the long weekend for Easter. Her sleep was better and she even slept through the night last night. But she was back there today and I’m now up again with her. Has anybody experienced/survived this and what did you do to settle your baby back to better sleep? Myself and my husband are at our wits end with this.