Three year old cries in her sleep and sometimes wakes up crying but wont say why she's crying and now she doesn't want to sleep in her bed. ?

She may not know: If your daughter does not wake immediately when you touch her she is in the midst of a "night terror", an anomaly of sleep like sleep walking. If she wakes immediately it is a nightmare & she will remember specifics.Night terrors occur in deeper sleep & kids have no memory of them.If you shake her awake you likely frighten her. Helping her get as little as 1/2 hr more sleep/d can stop the events.