definations 2 (dictionary.com)

it was horrible i woke up crying

NIGHTMARE
–noun

1.

a terrifying dream in which the dreamer experiences feelings of helplessness, extreme anxiety, sorrow, etc.

2.

a condition, thought, or experience suggestive of a nightmare: the nightmare of his years in prison.

3.

(formerly) a monster or evil spirit believed to oppress persons during sleep.