Phobia 1 (NaPoWriMo day 18)

Slight separation from reality
Unnoticed, yet it effectively
Removes a portion of the soul
Mars the mind so it's not whole
Once you've gone, there's no return
I've read enough that I have learned
The line between what's right and wrong
So thin I'm not sure I belong
On on side of the line or other
Certain thoughts, they like to hover
Cackling, suggesting action
Takes all my strength and then a fraction
To try to push the thoughts away
But what if someday these thoughts stay?

What if one day my resistance
Vanishes from my existence
And I find I've lost it all
Mind and body, till I fall
Under currents, watching motions
Listening to foreign notions
Screaming from the inside out
Yet muffled, no one hears me shout

I don't think that either of my main phobias are incredibly well-known, so even though the prompt said to tell without telling, I'm going to tell you that this phobia is of going insane (Dementophobia).