First lucid dream i think?

I'm unsure about my lucid dream last night as i think it was my first ever as i had just woken up form another dream where i just checked whether i was dreaming by trying to breath under water although i realised i was dreaming i woke up straight away and when i went back to sleep i got in a dream and this dream confused me

You see i was creating things in my dreams like a fencing as if i was setting up a place to live for me and my family but i wasn't all there as after that i tried to make a water slide for some unknown reason as if i wasn't in control but i was as i was making all these objects appear and then i thought to myself when am i going to telll my family that we cant live here as if its a dream but the question i havve is if i kneew it was a dream why was i treating them like real people when theres just DC's? and also why was i doing stupid stuff like creating a water slide?

but on another note i can remember pretending to swim and ending up flying but i realy need some help as to whether i was actually lucid i not im very unsure?

If I'm reading correctly, it sounds to me like the first dream where you tried to reality check underwater is the lucid dream, provided that you managed to finish the RC and realize it was a dream before you woke up.
The second one doesn't sound much like a lucid dream. It's really up to you to determine if it was lucid or not. If you knew it was a dream during your fence and water slide building then yes. If not, then no. I'd advise you be careful in determining though because the fact that you realized one dream was actually a dream doesn't mean that the dream following it was also lucid, especially if you woke up between the two.
It sounds to me like the first dream was lucid but it ended so abruptly and the second dream started so soon after that you're intermingling your lucidity between the two, even though you (possibly) were only lucid in the first.

Thanks for that, i have realised i dont think i was lucid in the second but im sure i was lucid in the first even if it was only for like 10 seconds!