what does it mean when you dream of a two-headed snake. Am I in for bad luck or what?

I'm going to take a stab in the dark on this one, since you haven't given much else on this dream - I feel maybe this snake is presenting someone or something in your waking life that is frustrating you and either way you go you feel your not winning.  Well in the end only you can make the choice if its bad luck or not ... I hope this has helped you Mary take care - Peace