Weird series of lucid dreams

They felt so real that at one point i actually confused them with reality even when i was awake. It always took place underground under a graveyard, there was a tunnel system made of tree roots. I rememeber a girl leading me through them with no real goal. At one point i even had a lucid dream where my life was completely normal, but i could still recall the tunnels, i remembered a dream inside a dream. I feel like the roots under the graveyard was smth symbolic, like the life stories of every dead person and how each of their lives connected in some way like roots in a complex system, and I remember nothing of the girl, she was my age at the time (4-7) and was very mysterious, i dont remember if she spoke or not but if she did it wasnt very often, she would always gesture for me to follow her and we would walk around aimlessly. I got the vibe from that girl that she wasnt a normal girl, she was some sort of entity, and it felt like she had been wandering in the tunnels for centuries if not milennia, she seemed like she wanted to show me something, for some reason i deeply trusted her, like i knew she was right and could be trusted from the second i saw her. In one of the dreams i started on the ground in the graveyard, i was with my grandparents and it was pitch black outside, i remember having a crocodile toy in my hand which i had bought irl sometime before, also w my grandparents. I suddenly fell through the ground and ended up in the tunnel system, but i wasnt scared at all even though i wouldve been irl, instead i was intrigued, curious and very fascinated. One day these dreams eventually stopped and i realised they werent real, so i played it off and kinda forgot abt it, but i was 100% convinced they were real for atleast year before that. I even remember confronting my grandparents abt it which is where i got the idea that it was a dream, But i never remembered waking up from them. It really felt like a memory, but a false one. Im convinced that they werent just random but i still have no concrete explanation.