There is always a trigger that sets a panic attack into motion. It can be a conscious trigger. Somebody says something about their job and this brings up anxiety and fear about your own job, and then the panic sets in. Oftentimes, the trigger is unconscious so what you want to do is try to bring the unconscious fear, conflict, ambivalence, whatever it might be, to your awareness by looking at what's going on in your life and honestly considering aspects that are unsatisfying which may be generating the anxiety and panic.