My girlfriend is really upset with her dad lately and last night she said she wanted to kill him but doesn't want to go to jail. Today she giggled in the car and said she was going to kill me someday. We've been together 6 months and everything has been great. She's never said anything like this before but she's on a new pain medication so maybe it's affected her but honestly after she said those things I'm a little uneasy. What should I do?