I did a terrible, terrible thing

did something awful.
I traveled back in time and altered my past.
I witnessed an alternate existence. I saw... the passage of time unfold in a series of events outside the current causal sequence as we perceive it.
I have sinned.
I have played God with my own reality, and reached into a parallel universe where there is no place for me.
I have participated in personal histories that are not mine to share. I have memories of things that haven't happened, that could not happen. My mind is ripped in two with this co-existence of a life not my own!
I have rearranged the very fabric woven between people through actions of their own choice and fate, and attempted to thread my own tapestry upon it.
Oh, God, what have I done?
This is not real.
This is not my reality.
That is not my universe.
This is not me.
That is not me.
They are not mine.
Nothing is.
Shit.
What have I done?