I'm sorry that you are feeling that way hon, but I really don't know what to say. I looked at your bio, but it doesn't say much.
The only thing that I think of that can affect a person like the way you describe it can maybe be psychosis through bipolar, Skitzophrenia, or any other mental disorder. They kinda remind me of intrusive thoughts. Dissociation is a common symptom of many other mental disorders.
I myself do also get thoughts from Others, but they usually pertain to a life event that's within the frame of reality- not saying that yours aren't---I don't know.
With DP/DR, reality testing stays intact....things just don't feel real.
I hope you get help and get better.