Suddenly Scared

Our 2 year girlkin has always been cautious of doorways that lead outside. Now shes scared of entryways from one room to the next in our house, behind the couch, wont go down the hallway. It started as her very slowly and cautiously walking into the kitchen. Now shes stopping and whining for her ball and wont go in the kitchen unless you walk her in there. Now it’s the kitchen and the master bedroom. These rooms both connect to the family room where we spend most of our time. This is our “go getter” bird dog. She doesn’t show any hesitation or fear outside. Any ideas? Psychic? Dog Psychologist? Haha