Well, i experienced this too when in my several first lucid dream attempt. first, im overly excited when obtain the lucidity, then ofc you already knew what happen next. the next day i browse the solution, and trying to apply the "calm and enjoy" the dream state. after i entering the lucidity in the dream again, i start to just relax and not got too carried away, move around, stabilizing, RC, enjoying the environment, then what happened next is im start to losing lucidity and just got another usual dream lmao. i feel very funny when i woke up from the dream. guess this happened to everyone.