Sleep Issues

So we've been having some sleep issues with Keira. And before I even start this story, I will be the first to admit that as parents, we have been very very lucky with Keira and sleeping. She has slept thru the night since she was 10 weeks old. Since that time, we have never, not once had to get up in the middle of the night with her. She's never been sick or anything like that that has kept her up through the night. She is in bed every night by 7:30 and usually asleep shortly thereafter. She has only gotten out of her big girl bed once since we switched her 8 months or so ago. So, like I said, we have been very lucky in terms of sleep. Over the last week, Keira has started to say that she is scared when we are trying to leave the room after story. She then starts crying hysterically. It is the most heart breaking thing to hear your child say they are scared. We can't get her to say what she is scared of and Wade suspects it is just a ploy to keep us in the room longer. We tried doing extra stories, leaving lights on, doors open, giving her a flashlight to keep in bed with her, going through the closets and under the bed so she knows nothing is there, reading a story about other kids (Ernie is a kid, right???) that are scared of going to bed, but nothing seems to work. Here is hoping this is just a phase that ends very very quickly.