Why does cerebral drama occur at night?

We've all got our shit to deal with. Unfortunately, others also have our shit to deal with too. You don't get to pick and choose how other people will respond to your madness or selfishness, but you may have to live with it.
Blow out is often seen as bad karma, but really...maybe you earned it.
I had a dream the other night. I don't put too much stock into dreams because as Ebenezer Scrooge says, "you may be the effect of an under cooked potato or a bit of undigested beef"
Never the less, my dreams are telling.
I recently had a dream wherein my wife put down her instrument in the middle of a jam we often attend to walk over to me and point out the 6 men that she had recently slept with. (caveat, she hasn't...)
I woke up mad.
Another nocturnal event had me shouting at my boss for being an utter tit with no clue about the daily goings on. Albeit true, I'd never resort to a public thrashing such as that.
I'm a news junkie. I had a dream that the jet I was on crashed into the sea. Many were lost...horribly. Victims were dismembered, burnt and bloated. I survived via a short swim. The dream was so vivid that I woke with heavy guilt that I survived while many perished.
Another dream, I lost an arm. No idea how...but for a motorcyclist and photographer, this is NOT good news. I just sat in a white room and cried.
So why is it that we can fumble through our respective days oblivious to our deepest fears and anguish?
Why, on our pillow, does all the shit slide down the wall and onto our brain?
What's your poison? Debt, age, health, kids, unfaithful spouse, middle age, aging parents, rebellious kids...
Why do our thoughts overtake us the moment we're meant to recharge...reboot...rejuvenate?
How many books have been written by authors with all the answers? ( we all know that they lay awake at night too! Save your money!!)
We try so many tactics and angles to sleep.
SEX, tea, lavender, reading, yoga, stretching, meditation, prayer, reading, massage, alcohol, snacks...
I may have missed your favourite angle, but I bet you lay awake too.
My brain is a convincing lier. My brain whilst horizontal on my pillow has a way of nullifying the effects of my citalopram and thereby convincingly whispering everything to me in the language I trust, everything  I dread or fear about YOU or me! ESPECIALLY what I think of me and what I think that YOU think of me!
This is quite like chasing a feather in the wind.