M.J.
I know that there has been tension but from most of my experience and reading what others have said this is not an uncommen thing what will probably be best is to wean her from having you there you can do this gradually. She needs to be able to sleep with out you there. Also I know that you play music for her before she goes to sleep try playing it all night. Also you can try to put a goldfish in her room the sound of the air in the aquarium and watching the fish might sooth her as well.