I am not sure I understand which term you are referring to. "Schizoaffective" is symptoms of schizophrenia (usually limited to just the positive symptoms) along with a mood disorder.

Is a doctor saying that you have schizoaffective because he thinks you are hallucinating pain, and you also have a mood disorder?

I just wish to warn you, if that is the case, that a family member of mine was in chronic pain due to no known medical cause. Eventually the family member became depressed. Then psychotic. And was diagnosed with schizoaffective. However, the family member had hypopituitarism. Low hormones cause chronic pain.

Just because the medical cause is not known obviously does not mean it is not medical. It is easy to diagnose a mental illness based on not knowing a medical cause.

But perhaps I have misunderstood your question.