I have had experiences like that before. It seems to me that at times your subconscious is checking to see if you want to have a lucid dream or not, by throwing blatant dream signs at you during your dreams. Or you will dream you are having conversations with others about lucid dreams and things like that. When that happens to me I then start trying more RCs and mantras so I will have an LD...because usually you are close and just need a little effort to make it hapoen.