I'm very new to lucid dreams. I got into it yesterday from researching sleep paralysis.

In my dream I realized that I could breathe under water. And I realilzed that I was dreaming and I said it to myself. From there everything began to fade, but it also felt like everthing was becoming extremly real at the same time. I freaked out and woke my self up. Did I gain lucidity? When you gain it during a dream what should it feel like?