The years I had insomnia, yes-----I used to hear music sometimes, sometimes a voice calling my name or making a statement, and I would sometimes feel a presence (eg: I worked in a student rathskeller and when I would go in back before opening I would hear the jukebox and "know" someone was at the counter even though I knew they could not be...on closing, I would feel as if something was rushing at me as I closed the doors)
It was a long time ago but I remember .... not fun.