Scared of the Dark, What do I do?

Olivia has become terrified of the dark. We bought a night light and now she is extremely scared of the shadows it creates. We started leaving her main light on in the room but she is still scared and points to everything and thinks it is a monster. The look of terror in her eyes when we leave the room is hard to deal with. We don't know what to do, Steve and I are at our wits end. PLEASEEEEEEEEEEE if you have any suggestions, please comment below. I know that I have more readers than those who comment regularly, so if you are a mom or dad and have been through this or if you remember what your mom and dad did for you as a child when you were scared please let me know. We reassure her over and over that there are no monsters and that mommy and daddy are right here in the house. We pray with her. It takes hours for her to fall asleep and we don't want to get in the habit of having her sleep with us plus we don't go to bed the same time she does. If we lay with her in her bed she stays awake and won't go to sleep. A few friends I've asked have not dealt with this with their kids so I'm stuck. What should I do? HELP!