Something coming do devour everyone?

Last night I had the weirdest dream. It was rather frighting actually -- and also very hard to explain. It was one of those "you had to be there" dreams -- but I'll do my best to explain. It has been on my mind all day long. I can't get it out of my head.

Basically, I was in some sort of large building. It was quite tall, but also very wide. There were people inside the place on all different floors. I came across one guy who was all dressed in black, and he had a plastic face mask on. Some sort of respirator. He was sitting down (looking exhausted), and there were all these flies. He had the mask on to protect himself from them.

As I was walking to him, a giant fly came down to attack us. The fly was really weird. It was something that if it touched you, you're finished. It was like radioactive or something. It was trying to attack people's faces and contaminate them or something. So I grabbed some sort of spray in a can, I don't know what it was but it was rather sticky. Maybe like spray on glue? I sprayed it everywhere in the air (aiming at the fly) and the fly "thing" couldn't fly anymore. Then the guy with the mask on congratulated me on defeating the contaminated fly. He was sitting down because he was tired (and kind of resigned) fighting these things. I had no mask too!

Then, we went into another room to hide (some sort of bathroom?). But there was a keyhole and a fly started coming through. The fly was REALLY elastic. It didn't matter how hard I tried to plug the hole with my hand, the fly got through. Then, the whole dream kind of changed. I remember (feeling as though there was no way to defeat all these fly "things"), so I (somehow) created a massive yellow/gold ball of light or plasma or something, in the center of that big building. It was highly radiant, and filtered through the whole house and kept everyone safe. The flies couldn't fly in it.

Then I notice outside the house, there were human sized flying creatures (or, a bit bigger than humans). They were kind of like ugly black creature things with huge wings, flying around everywhere. They w ere grotesque. Then I noticed that there was one HUGE one, in under the bottom of this huge building. It was black as black could be. It was as tall and wide as a large house room. It had made a big hole in the bottom of the building and was sheltering itself from the plasma light that was filtering through the whole building. But the light was slowly starting to fade. It was just waiting for it to fade enough so it could come through the house and annihilate/destroy/consume everything in it.

So, I made my way to the very top of the building, and I was shocked to see that all the top windows were gone, the fly wire was destroyed. There were all these flies and flying black beings with wings all around the house and the light was really starting to fade now. I remember flying outside the house and the rest of the dream was pretty much me flying 20,000 miles per hour around the sky, trying to dodge all these ugly creatures. I don't remember what happened after that.

This dream has been stuck in my head all day and has affected my mood greatly. Man, I can't get it out of my head..