Anxiety is a word that encompasses many feelings
Anxiety is an umbrella term for a number of concepts, including:
Worry
Panic
Angst
Nervousness
Fear
What term you use to describe the feeling is typically determined by what you presume is the object of that feeling. After a flash fire on the stove, you’d say fear. An unexpected email from your boss asking for a brief Monday morning check-in might be worry. Anticipating an upcoming trip with your sister after a few tense text exchanges would perhaps be angst. When you’re unsure of the object but feel a general sense of all of the above, you tend to label that simply as anxiety.