Ten months old is a difficult time developmentally to make this change, because children this age are starting to understand there are people in the world besides themselves. It is prime time for developing stranger anxiety. She'll get used to her new environment, see you still come to pick her up each day, and get those teeth in and life will be easier. If she doesn't have a transitional item like a blankie or a stuffed toy I would encourage her to choose something to take to daycare each day. Make sure you get more than one so you can wash or lose one without trauma. Kids are adaptable. As long as the environment is a healthy one, she'll be fine.