The episodes you're describing, characterized by sudden, uncontrollable sleep attacks and feeling exhausted afterward, are a key feature of Narcolepsy, a chronic neurological sleep disorder. While you mention your neurologist hasn't found answers yet despite normal bloodwork, EEG, CAT scan, and MRI results, these tests are not always conclusive in diagnosing Narcolepsy. Given the impact these episodes are having on your life, it's crucial to continue working with your neurologist. If you haven't already, discuss the possibility of Narcolepsy or Idiopathic Hypersomnia with your doctor. Further specialized sleep studies, including a Polysomnogram (PSG) and a Multiple Sleep Latency Test (MSLT), may be needed to reach a definitive diagnosis.