The lost Reminder in a parking Lot

"I was standing in a parking lot holding my keys, trying to remember where I was going. I knew it was important, but every time I tried to think about it, the thought slipped away. My phone had a reminder on it, but when I opened it, the text was just a bunch of symbols. I started walking toward what I thought was my car, but it wasn't mine. Then I was in a classroom, late, and everyone was already taking a test. I didn't know what class it was or why I was there. The teacher asked if I had my assignment, and I said yes even though I had nothing in my hands. After that I was at home, searching through drawers for something. I don't know what it was—just this growing feeling that I'd left something behind somewhere and it mattered a lot. I woke up before I found it, still trying to remember what the reminder said."