Panic Disorder is defined by at least a month of recurring unexpected panic attacks with a fear of having more, tendency to avoid situations or experiences where panic attacks have occurred leading to a lack of freedom, and an extreme concern about what the panic attacks might imply or result in (ex. loss of control, sanity, death).
Panic Disorder can be experienced with or without Agoraphobia.
But don't get discouraged! Panic attacks and Panic Disorder are highly treatable!
Follow this link for info on seeking help for Panic Attacks