I have been diagnosed with schizophrenia for a few years now and have had a hard time believing that I am ill since the diagnosis.

Since as long as I can remember I have always felt unwelcomed, like I don't belong and that if other people watch me that they can tell I am not one of them. Sometimes these thoughts make me believe that the body I inhabit is human and that I am an another being who has no mass and only uses this body as a home. I often feel that I'm a parasite and it makes me and the host feel uncomfortable, it's almost as if the original host mind still exist and is competing for space. Sometimes the host can believe he is schizophrenic because of my presence but in reality the host feels ill because of my me and not because of some earthly disease.

Has anyone else ever had similar thoughts? Or does this sound like a typical delusion?