panic-struck
1. [ adjective ] thrown into a state of intense fear or desperation
Synonyms: panicked panic-stricken terrified frightened panicky
Examples:

"became panicky as the snow deepened" "felt panicked before each exam" "trying to keep back the panic-stricken crowd" "the terrified horse bolted"

Related terms: afraid
Similar spelling:   panic-stricken
  panic_attack