Anxiety is literally facing fear itself everyday. Quite the malevolent little trickster it is. Anxiety may or may not go away on it's own - it really depends on you, as well as the severity, what triggers it and how often triggers occur (Like if you were deathly afraid of food, you wouldn't have an easy time getting rid of it by letting it go on its own). I cured my anxiety by just strengthening my mind through natural means: Herbs and tonics, eating healthy, exercise regular, meditating (very important), and just communicating with other people on the forum here. I used to find that helping other people on here sort of made my own anxiety go away, so I'd sit on here when I was anxious and just skim through general discussion and add my own 2-cents to topics.
The thing to focus on is that anxiety is able to be controlled - it just takes time. You're fight or flight mechanism is just fried atm, and you're reparing it :]