Possibility of misdiagnosing schizophrenia as schizotypal personality disorder ?

Possible: If you have concerns about the diagnosis, see your doctor or seek and second opinion from another doctor. Good luck.

That might happen: If a person with a severe schizotypal personality disorder had decompensated into psychosis ; is only seen over a brief period of time. However, most providers avoid making a diagnosis until they are satisfied that diagnostic criteria have been met.

Yes: These disorders have a great deal of overlap between the two of them. Get a second opinion from another psychiatrist to confirm or refute the original diagnosis.