John is a 45-year-old male who has been experiencing frequent migraines and recently began seeing a new primary care physician. John tells his doctor that he often feels like there's someone else controlling his thoughts and actions. He reports hearing voices multiple times a day, which tell him to do harmful things. John appears highly anxious and distressed while describing his experiences. His medical history indicates that these symptoms started about ten years ago and have progressively worsened. Based on this information, you would MOST likely diagnose John with: