oneirocotidiphobia

The fear that one's dreams will resemble reality too closely. Often accompanied by the fear that it will be difficult to realize that one is dreaming, and that it will be difficult to wake up.

Patient: I dreamt that I was myself, just sitting on my bed at home.
Doctor: That seems like a normal dream.
Patient: It was terrifying! I couldn't wake up!
Doctor: You might have oneirocotidiphobia. I will prescribe Surrealist Art Therapy.