Strange Story

I woke up and saw a girl dead on the floor. I walked over to her and poked her to see if she was really dead and she was. I didn't know what had happened, but it might have had something to do with the argument we had last night. I decided to go to the bathroom to take a shower. Once done cleaning myself off I looked at the mirror and to my surprise I couldn't see myself in the mirror. I got dressed and decided to leave my house and wherever I saw people none of them seemed to notice me. I tried yelling but no one could hear me, this was all really strange to me. I decided to walk into the street to test a thought that was going in my mind. A car going 30 mph drove by and ran right through me and I just phased right through it. I was wondering if that might happen and to my expectation I must be a ghost and the body I saw lying on my floor was actually me.