Your dream is quite amazing as it closely matches things the author wrote about.
He also captured the entity and pulled it out of his body.. He described it as ….everything went white and he felt a single tear in his eye and then his chest felt like it was full of grease before he felt it bulging out of his central nervous system and out through his throat and mouth when he grabbed it and pulled it out and killed it. As he pulled it out he describes how the acid secreting from the entities teeth was cutting and making his hands bleed as well.
When he went to a clinical psychologist for help he was refused in fear that hypnotherapy treatment would bring back all the fears again and the entity would be reborn in him. He was then treated with ECT therapy and heavily medicated with what I can only call a cocktail of heavy duty drugs to this day so he can cope with his amazing past and daily life…