I think I might be having those NREM dreams too but not recognizing them as such... But I do have "thought dreams" early in the cycle when I'm first going to sleep. They might be just images, but might also have plots and be a bit longer too... Not nearly as vivid, they really seem like they're in my head, as opposed to me being inside of them. I'm not sure, but I couldn't really imagine getting lucid inside of them.

Did attempt to lucid last night, but had some insomnia which is unusual for me. However, it's about a million degrees in my bedroom the past few days, and on top of it, noisy outside my apartment. Will try again.