I was wondering, if you leave your body, are you considered a "ghost" or is it just like dreaming and what happens when you're having OBE doesn't have to do anything with the real world?

I ask because during an OBE yesterday I was walking upstairs, at that moment my girlfriend was walking down. I told her (thinking I was awake) to stay at the top of the stairs til I come up but she just kept on walking. Because the stairs are narrow I kept shouting "what are you doing you want us to fall down" but she just kept coming down and she walked right through me mid way at which point I got really scared thinking I died and started screaming. I awoke shaking just as she walked into the living room.

It really freaked me out.