So a few nights ago I got my second lucid dream unfortunately it was nothing on my first...

Basically I found myself pulled underwater by a large wave in the sea and didn't have time to take a breath before I went under. I fought as long as i could but eventually the instinct to breathe came over me and I took a breath (ability to breathe underwater is a sign for me that I'm dreaming). I was shocked naturally but did plug y nose to see if I could breathe (....) and I became properly aware that I was dreaming. Just as I was about to check my hands I "felt" my "eyes" open and had a vision of my old bedroom. I tried hard to keep them shut to stay in the dream but "woke up" in my old bedroom. I was logging on to my laptop where I then woke up for real. Was I at the end of my REM phase??