/ˈæŋk.ʃəs/
feeling or showing worry, nervousness, or unease about something with an uncertain outcome.
"she was extremely anxious about her exams"
  Worried
/ˈwʌrɪd/
anxious or troubled about... 
  Overwhelmed
/ˌəʊvəˈwɛlm/
.
have a strong... 
  Threatened 
/ˈθrɛtn/
state one's... 
  Scared
/skɛːd/
fearful; frightened.
"I... 
  Insecure
/ˌɪnsɪˈkjʊə,ˌɪnsɪˈkjɔː/
(of a... 
  Weak
/wiːk/
lacking the power to perform...