What does it mean to dream about nothingness?

I had a profoundly scary dream last night where I was walking the streets, and next thing I know I fell into a completely infinite black hole that led absolutely no where all around, it was completely dark all around and I could not feel nothing, see nothing, hear nothing, I was just there trying to find a way out but that the thing there was no way out or even something there, I was just walking on dark emptiness on air, I was like in a non-existent place. Just like being trapped In a mirror but a million times worse, I was yelling for help but there was nothing there or even a single object there, what kind of dream what trigger this? It was absolutely quite terrifying