My Mental Illness is Manifesting as Hallucinations

Apparently my mental illness thinks it's funny and likes to be super on the nose. A somewhat recent development is that I have developed hallucinations in my trauma responses. Extreme emotions make me turn into a monster. I do not mean that figuratively. I can feel and see in my mind my body transform into something inhuman. The first time, it was a preying mantis monster. The latest time, it was essentially a werewolf. I've had a few others in-between. Why is this happening? My partner and I theorize that I am so terrified of becoming my abusers that my brain is magnifying my extreme distress into me living out my fears in a literal sense: becoming a monster. If this were in a novel or a movie, I'd call the writer a hack.