I think this will be great for you! Everyone has nightmares, just like the ones you described. While most don't sleep walk, everyone experiences them to a varying degree. Lucid dreams are actually considered a great solution to confronting your nightmares, and to conquer your fears once and for all. As for the man standing over you, you are a mother and I'm sure home invasions and your child's safety are the most scary things! I think it was just a stress dream, nothing more. While the dreams you experience when trying and achieving lucid dreams are very vivid (sometimes almost impossible to tell apart just by sight), I think it is still very much for you!

~Raven