I was always of the belief that when you died that was it lights out and nothing and you, as has already been mentioned, return to earth.
Now I am a very logical and practical person.
There was a medium at at relatives house a few years ago and out of curiosity I went in to have a chat on my own with the medium
He told me some things that I cannot apply any logic to as regards me being alone with a close relative who had died shortly before I got there, to that relatives bed side.
There was just me and my dead relative and logically unless mediums can read minds, I have absolutely no idea how they were able to say what they did.