Diagnosing mental health disorders requires an in-person evaluation. Generally speaking, in the absence of any other symptoms, schizophrenia seems unlikely. Most people with schizophrenia don’t have occasional symptoms. Their symptoms tend to be frequent and debilitating. This doesn’t seem to be the case with you.
You might be describing hypnagogic hallucinations. Hypnagogic hallucinations are visual or auditory perceptions that occur while falling asleep. They are not typically associated with schizophrenia or other psychotic disorders but rather sleep disorders such as narcolepsy. Studies have also shown that hypnagogic hallucinations are common in people with insomnia, excessive daytime sleepiness, anxiety disorders, and depression.
I would recommend consulting a mental health professional and or your primary care physician. Also consider undergoing a sleep study. Treatment will depend upon the underlying cause but may include medication or psychotherapeutic interventions. I hope this helps. Please take care.
Dr. Kristina Randle