Where does the dream begin?

"You're sleeping with your glasses on?" a voice came from behind me... "I think I dozed off," I said, turning around while holding my phone, which was in sleep mode. (Is the penalty okay?!) I looked at my phone again, but the phone I thought I was holding was gone... Turning back again, I saw the phone charging. Huh? Didn't I have my phone? Before sleeping, I forgot to take off my glasses after charging them, so I apparently dreamed that 〔I had just been playing a game but fell asleep〕. Even the feeling of holding the phone and that moment of worrying about the penalty were just a dream.