Anxiety

Anxiety is defined as a feeling of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.  It is a physiological disorder meaning that it affects your cognitions as well as you feeling it in your body. Anxiety is a common experience that can be situational or psychiatric in nature, and it can sometimes be linked to depression. 

Evidence-based treatments to decrease or eliminate anxiety include cognitive behavioral therapy, medication management and psychotherapy. 

Anxiety is very common and treatable. 

Resources: 
Anxiety by Harvard Medical School
Anxiety Disorders by the National Institute of Mental Health
Psychotherapy Guide for Generalized Anxiety Disorder by Verywell Mind