Down deep.

There's a fear that bubbles, just underneath.
It's the ground thinly covered with autumn leaf.
It doesn't take much, to knock your stance,
And your nerves begin to tingle, dance.
Tiredness, stress, too much to consider,
Can turn confident mood into a dither.
A moment of peace, a period of sleep,
Revive for a time, but it's still down deep.