Bad Dreams

What's up with these nightmares?  My life is easy.  I've never been traumatized.  Never done mind altering drugs.  Yet  every night, when the dreams roll in, they're bad.  
This week I was chased by  a swarm of batlike things.  Batbugs or Mothbats.  There was a switch in the room to turn them off but I couldn't find it because they were biting my arms, shoulders ears and cheeks.
Then I found myself wandering up a sidewalk, after dark.  Rain fell.  I could taste the drops.  Gloomy jazz music played and a narrator chimed in "abandoned by her friends and family, she was never seen alive again.  Her savagely beaten and strangled body was found in a ditch..."
Where does this stuff come from?

The next night I dreamed that I hadn't slept for three days. Then I looked out the window and saw flames and smoke topping a nearby hill. I went outside and discovered distant flames in each direction, miles away but getting closer.
Stupid fire season! I thought.It gets worse every year!
I tried to comfort myself that I'd "only" die from smoke inhalation before the flames reached me.  Then I figured a blaze this big was  hot enough to roast me from a distance, the way a campfire gloop-afies a marshmallow without touching it.  Was I doomed?
Wait!  There was a way out, to the southeast.   I scampered up  the road to safety.
BOOM!
A fifty foot plume of flire rose ahead of me, blocking my escape.
"Someone's doing this on purpose!" I yelled.

Crazy dreams!