Late without Knowing why: Dream of missing Shoes

"I had this dream where I was already late, but I don't know for what. I was in my apartment looking for my shoes and somehow there were shoes everywhere, none of them mine. I found one of mine under the kitchen table and just put it on without looking for the other one. Then I was outside in a school hallway. I had a bag with me and it felt really heavy. I kept checking inside because I thought I had something important in there, but it was mostly random stuff. A spoon, some papers, and I think a TV remote. Someone called my name from behind me. I turned around and it was a person I haven't seen in years. They asked why I hadn't finished something. I tried to explain, but suddenly I was sitting in a car with the same person. We were going somewhere, I think. Then the car was gone and I was standing in a supermarket. I had a list in my hand, but the writing kept changing when I looked at it. I started feeling really overwhelmed. I remember thinking, "I can't do all this." Then I woke up. My heart was beating fast and I still had that feeling that I was late for something."