MSRA-0562

A 35-year-old woman presents to your clinic with a history of recurrent episodes of dizziness characterized by a sensation of the entire room spinning around her. She reports feeling nauseous during these episodes but denies any hearing disturbance or tinnitus. The dizziness is not exacerbated by head movement and lasts for approximately 4-5 hours, with complete resolution in between episodes. She recalls having a viral illness the week prior to the onset of her symptoms. What is the most probable diagnosis?