Dreams, over and over again?

For the past four weeks now, I have been having the same dream over and over again. I'm always watching myself in a forest. There is a fire circle. Women in long blue dresses dance around the fire, making it rise everytime they go around again. I'm always standing and watching them from behind a tree, and then a giant, gold butterfly flutters out of the fire and flies straight to me. I dissapear. Then I wake up. After the dream, I usually have an odd lullaby stuck in my head. Just the melody, of course....Accept for the word "goddess". Any idea what this means? I' clueless.....