trepidation
US /ˌtrep.əˈdeɪ.ʃən/
UK /ˌtrep.əˈdeɪ.ʃən/

1.
a feeling of fear or anxiety about something that may happen
:
•
He felt a sense of trepidation as he approached the stage.
•
There was some trepidation about the upcoming exams.
a feeling of fear or anxiety about something that may happen