shitting planks
panickingly
scared
nervous as a whore in church
nervous as a cat
fash
gliff
fret
windy
ph33r
frightened
scareful
alarmed
petrified
worry
fantigue
scary
fearingly
shaky
chilling
hyperanxious
one's heart in one's mouth
nervous as a long-tailed cat in a room full of rocking chairs
scared spitless
scared shitless
eerie
startled
scared to death
hair-raising
weeping and wailing and gnashing of teeth
semipetrified
brick it
daunted
petrifying
chemophobic
shit scared
shook-up
solicitousness
solicitude
fearful
consternated
troubled
gabra
apprehend