Yes I saw that movie.
Very cool & true.
So here's my preachy boring answer lol...
(I'm reform Jewish if that makes a difference)
But you don't have to be religious
to see the Butterfly effect manifesting in the world events now.
Anger breeds anger, hate breeds hate, etc.
You said it was something small you aren't aware of,
that tells me you are a very spiritually intune person,
ahead of the curve of most people.
To mess up is human, to truely forgive is divine...Starting
with forgiving yourself first off.
First, If YOU expect things to play out a certain way subconsciously,
it will play out that way..your body language/tone of voice/etc is 80% of communication.
Second, don't beat yourself up over pinpointing the one
action that lead you to feel sad & post.
This dark time you'll turn into something positive since you're sincere.
Maybe a new horary is needed?
Do you feel drawn to anything you think would help you be happy?
Do you suspect there is something you do that's holding you back?
Be very specific & give timelines too
if ya want, that helps the forum readers.
Good luck & Blessings~