A 27-year-old female comes to the clinic with episodes of staring, lip smacking. and picking at her clothes. The episodes are preceded by a feeling of her "stomach rising," and she has little awareness of the events that follow. They last for 1-2 minutes and are followed by a period of confusion. She reports having 3-4 episodes per month for the past 6 months. An electroencephalogram (EEG) shows interictal epileptiform discharges. Based on the clinical presentation and EEG findings, which of the following is the most likely diagnosis?