This is pretty much the goal you're going for. The idea is to hold onto that awareness as the dream materializes.

Though, your lack of description of other WILD signs (Sleep Paralysis, Hynogogic Imagery, etc.) makes me wonder if you just had an intense day dream whilst falling asleep (I do this all the time), or if you near successfully completed a WILD.

What did you feel as you were WILDing?