This dream may reflect feelings of betrayal and struggle in your waking life. The mention of your grandma’s place and aunt Barbara may symbolize a sense of family and tradition. The encounter with aunt Barbara may represent a sense of disappointment or resentment towards someone who is not fulfilling their familial duties. This could also be a reflection of your own feelings of guilt or inadequacy in fulfilling your own responsibilities. The loss of your phone and keys may symbolize a loss of control or direction in your life. The fact that you eventually find them where you thought they should be could suggest that you have the power to overcome any obstacles or challenges you may face. The strange, empty white room with only food shelves and a sink on the floor may represent a sense of emptiness or lack of fulfillment in your relationships or living situation. The fight with the flatmate could symbolize inner conflicts or tensions with those close to you. Overall, this dream may be urging you to confront and address any feelings of betrayal, struggle, and emptiness in your waking life.