Dream catcher, anyone?

Let me ask you this: How can one be certain of one thing if he doesn't even remember it? See, I know I've had this exact same dream a few times before but I can't remember what happens in the dream. I just feel it in my gut that it has been recurring for days now, not consecutively though. Now I don't know how I feel about going to sleep and possibly dreaming it (whatever "it" is) again. I'm confuzzed.