Try using a tape recording device on your nightstand next to your bed. If it can only record for a 2 hours get one that last for 4 hours or more, you can purchase/even rent these items at a spy store.This might give you information you need to handle sleep talking/and other issues that you are not aware of. I talk/curse/and have full conversations with myself. Not only that when i stay with my ex on the weekends he has conversations with me that I am not aware of!