Just think of it like this: After a test you might feel "anxious" because you think that you did bad on it. (You kind of feel jumping and nervous.)
nervous
You might be anxious when shopping because you enjoy purchasing new items and using them afterward. You might also get anxious to impress a crush or a group of people. Overlook your life to see if...
you are waiting for something to happen.....
Insecure?