Hmm, the only thing that really comes to mind is my fear of being forgotten/deemed unimportant or nonexistent. I remember that I had developed it when I was up late one night, and I read something right before I went to bed about the definition of existence, and how to exist is to be observed by something/someone. It was a good article, but I forgot where I found it since then. But that night I such a horrible dream that I woke up paralyzed that morning.
That and also losing someone close to me...I don't handle important loss well. That also happened in dream, except I woke up crying too. I'm not afraid to admit it.