I think that used to happen to me all the time, where someone would tell me that its a dream or i would realize it, but have no control, just continue on whatever i was doing.
just read up more on LD'ing, on the meaning, but im just saying what everyone else said. or perhaps, if you can, next time say "I AM LUCID NOW" or something that will help you gain more control.

oh! and welcome!

Have you ever tried to step in my shoes?!
Have you ever tried to balance on that beam?!
And if you ever tried to step in my shoes,
They’d never be quite as soft as they seemed.
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