K.L.
All i can really say is that she is used to you sleeping in the room with her and she can feel it when you are not in there. That is just like a smaller baby staying the night at someones house. They will not sleep good because it's like they can feel that they are not at home or something i really don't know. It will take time for her to sleep alone through the night in her own room. That is like my son, he is 3 almost 4 and he has slept with me since birth and now he has his own room with a toddler bed and he will not sleep through the night in there either he will come get in the bed with either me or his dad and then he will sleep like a baby. I am kinda going through the same thing right now too.