What's her deal?

I hate that I don't know what's wrong with baby girl when she wakes crying in the middle of the night. She did it again last night at 1am. Shawn went in to see her and she was standing in the crib, anxiously awaiting one of us to come get her. He tried rubbing her head and calming her down, but she wanted nothing to do with her room, so he brought her in bed with us where she played for a bit. He finally took her back to her room about 20 min later. She laid in bed playing for a bit, then fell asleep. Not sure what's wrong. Teething? Growing spurts? Scared of her room? Wanting to play in the middle of the night? Let's hope this isn't a bi-weekly thing or else I'm gonna need an IV set up to my coffee pot in the mornings.