Opposite of Clastrophobia???

Wide, open spaces always make me very anxious, especially is they're bright? Even things like white rooms without lots of furniture make me feel uneasy, like there's no place to hide and like everyone can see you. Meanwhile, dark and small spaces are much more comforting, and if I'm feeling anxious I'll hide in my closet. Is there a name for this, and has anyone else experienced something like this? If so, how have you coped?