worry.

Heart sinking like lead, throbbing like the pulse of a rabbit. Sleep denied, rest deprived, with thought centred only on one thing. Tormented thought, dragged upon the roads of time, bitten by fear and uncertainty. The mind, trampled and beaten, holds on to the thought for dear life.
Prayers, muttered in silence, drowned out in solitude, repeated anew.
Fear gnawed at the life line, burned at the ropes of sanity. Demon wreaked havoc at the mind, tearing reason apart with relish.