I've had this happen; it seems to be common amongst those who are trying to develop their ability to lucid dream. There is some argument as to whether this dreaming that you were lucid 'counts' as a 'full' lucid dream, but I side with the positive interpretation that says that knowing that you're dreaming, even if unstable, lacking control, and lasting only a brief moment, still counts as a lucid dream. The other positive is that your dream-work (journals etc) is clearly affecting your subconscious and is changing your dreams. I strongly suspect that this is only the beginning, and that more and deeper lucid dream experiences await you

I suggest you add to your profile a LD count of 1; enter this dream into a dream journal here at this forum, and try again tonight. Keep going, and good luck!