I Died Yesterday

I found that I seemed to be dead. Died yesterday. You ask how I know? Because I saw with my own eyes that my body was loaded into a hearse and driven to the funeral home. At first I thought it was just someone who looked like me. But when I woke up, I was back two days ago. Then, the next day—— I saw my body again. It seems that no matter how I live, I will die "yesterday". It's just me, remembering nothing. Who can tell me—— What is going on?