D.S.
My daughter will be 3 in one week and we're barely moving her to her own bed. I think your daughter is much too young to be in her own bed. Looks like the company you had got her spoiled to a lot of attention and she's out of whack in regard to her normal sleeping routines and schedules. Do what you did before Christmas. If she cries, let her. She needs to know that things need to go back to the way they were before your company came. She'll eventually get back into routine if you enforce how it was done before. If you cater to her every whim (by staying in her room till she's asleep or letting her sleep with you) you'll create a nightmare that will be hard to break later. Stick to it and get her back on track. Don't give in. Good luck.