Dreams?

My name is Celia, I hope that someone can read this and explain a very vivid dream I had like two nights ago. I dreamed I was in some sort of building and that I was taking like a course of some kind, related to my career (technology). So I begin to hear this sound in the background kind of fading and it was a little girls voice singing "the wheels on the bus", I stop listening to the lecture at that point and hear the little voice, I turn to my friend and say "do you hear that"? She doesn't hear it only I do, actually no one does except me. So I follow the voice going up some creepy stairs and it leads to a door that leads to the rooftop of this building. I step outside and I still hear the voice, I turn to my right and see a little girl, she's a ghost, and she is floating because her feet don't touch the ground, she looks really pale and has what looks like rope mark around her neck, her hair looks nappy and with leaves, and her dress looks like it's decaying with her body, just really gross.

So she's singing but her lips don't move, then I start to panic and go against the wall, a priest comes (out of nowhere), and I tell him make this thing go away! Make it go!, and he turns up to look at me and his eyes look kind of like cat eyes or lizard eyes like really weird, and he smiles at me and says "you think that your safe, but you're not, we are all around you" and he busts out laughing. I panic and run like hell, I end up in some thing that looks like a museum, but it's a museum of religious things? Like a statue of Jesus on a cross, and like some saints etc etc. So creepy priest walks in and starts laughing in front of everyone and he starts saying random weird things, like "haha you think this is your god?" or like "your so called god wasn't born in December you idiots" and well all these really messed up things. Just so you know, I believe there is a god and stuff like that but when I woke up from this dream I couldn't put together why the hell I dreamed this, like I don't even go to church every Sunday, I'm more of a meditating woman you know? Please please help. Serious help not jokes, it felt like it had a meaning, just want some opinions. Thanks