hey, Mrs T. It could have been a FLD or maybe you got lucid for a few seconds and slipped back into a LD and just forgot about it…
I know saying this doesn’t help at all. 
You have to ask yourself if you felt lucid. I mean, was there a click “Hey! I’m lucid!”?
Usually (in the beginning of LD’ing at least) getting lucid is kinda WOW. But then again, you could have been low lucidity so you realised you were dreaming but not exactly how increadible that is…
These kind of dreams, where your not sure, drive me crazy! 