Anxiety is not the same thing as fear. Fear is an emotion that is triggered by the presence or idea of something we see as a threat. When we experience this emotion, our body releases adrenaline and cortisol. When the perceived threat is gone, our bodies calm down and return to their normal state. When the thing that scares us is gone, but our body still releases stress hormones, we are experiencing anxiety. We can suffer from anxiety when thinking of things such as getting an essay done on time, being insecure, so on and so forth.