I didn't think of asking about this experience on a forum until my friend suggested that I should today...
I'm 20 years old now. Ever since I was 12, I've had this interesting phenomenon that happens to me every night when I'm trying to fall asleep where a series of completely random images will flash through my head, one after another. I have no idea where they come from and they have no relations whatsoever to my previous thoughts or the image that was right before it. When I was younger, the images were more pure and beautiful, usually of animals and creatures... like random paintings that could possibly be a work of art. I used to even take them as inspiration (I'm an artist majoring in animation). But in the past couple years, the images are generally creepy, disturbing, or downright horrifying to the point where it may freak me out and keep me from falling asleep...
Note that this happens while I'm still actually fully awake. It's as if I'm already dreaming while I'm awake. It even happens when I'm still chatting with my roommate at night while we're laying around in bed (and then I proceed to describe to her the images I'm getting and freak her out too LOL)
Is anyone aware of what this is and why it happens? Is this an existing phenomenon?
I don't drink, do drugs, or any of that.