Haunted

At some point this morning I snapped out of a bad dream. In it I had a research paper due for a class that I was taking, which did not make a whole lot of sense since I am no longer in school. I no longer remember the topic or the class. All I remember is that sinking, stressed out feeling that shook up me and jolted me awake. I graduated 9 months ago. I should not be still dreaming about things like this. While I was still attending Stanford, when I was back at home during breaks, I always dreamed about flunking my exams or realizing that I forgot to go to finals. Lately, these dreams are not as frequent, maybe once every two months, but they still scare the hell out of me!! Do I have post traumatic stress syndrome? Am I going crazy?