nervous

adj.

[1]	highly-strung , excitable , sensitive , tense , agitated , wrought up , worked up , upset , flustered , ruffled , disturbed , perturbed , distressed , worried , anxious , troubled , concerned , disquieted , edgy , on edge , on tenterhooks , fidgety , fretful , uneasy , apprehensive , frightened , fearful , shaky , scared , skittish , (US) on a tightrope , (Colloq) jumpy , jittery , flappable , in a stew , in a dither , in a sweat , in a tizzy , in a flap , uptight , (Brit) nervy , (US) on pins and needles , (Slang) strung out
[2]	difficult , anxious , queasy , tense , critical , uneasy , unquiet
[3]	neural
[4]	aflutter
[5]	skittish , flighty , spooky