Just started on the forum and really researching lucid dreams in detail, but apparently I've been lucid dreaming for years after reading some of the terminology, threads, and descriptions. I have a lot of questions though.

First, is it common for someone to stumble into lucid dreaming? When I was young I'd have dreams I "wanted to see the end of" so I'd actually force myself into a WILD state, same with WBTB. Is there a way to use these techniques to actually go backwards to acheive DILD? (sorry if my terminology is off, new and all)

Secondly, I think I have met my spirit guide unknowingly. She's a lady in black with a blank face that "sends" me a picture of her expression and although we talk in the dream I never remember what she says. One of the things I intuitively know about her though is she has always been watching me and protects me. I've actually seen her quite frequently since I was about 10 years old (that I remember). How would I go about making contact, and what can I learn from her?

Third, I also have had a few instances of precognitive dreams, both mundane and really big (my wife's pregnancy, including the gender and personality of my son). How can I go about lucid dreaming and still be able to distinguish these messages from my own creation though?