Please, I would appreciate, someone who knows more Philip K. Dick work, is this autobiographical story, or work of fiction?

I mean is it like "The Blair Witch Project" where they made horror to deliberately look like a documentary.

This to me looks like fiction/autobiography made deliberately to like a fiction/reality fractal, sentences look like personal experience but again I have a feeling Philip is trying deliberately to push our psyche deep into the spiraling rabbit hole or unknown.