The prognosis for panic disorder is typically chronic in duration, and if you do have recovery, there is still a high rate of relapse. If you have panic disorder with agoraphobia, then the panic disorder is longer in duration, more severe, and associated with more co-occurring mental disorders, when compared to someone who has panic disorder without agoraphobia.
But you don't have to suffer. There is effective treatment for panic disorder. The following video explains how panic disorder develops, and what you can do to treat it: