"Do you ever have that feeling, when you're not sure if you're awake or still dreaming?"
No but actually, on certain occasions I'll recall an event that happened in a dream, and then realize "oh shit that was a dream..?" Weirdest feeling ever.
To the guy who made the point about dreams being our subconscience communicating with our conscience, I agree to some extent. I also think dreams represent our desires and feelings towards certain things. While I'm sure it isn't a fully legitimate example, last summer I had a couple awful dreams about my closest friend dying and then found out the week after that during that time period she had been considering suicide (I had no idea). I was mindblown.