Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

There's usually some sort of trigger for an attack, somewhere, and defusing those triggers can be half the battle.
Something called hypervenilation exists . I don't understand it very well , but it has something to do with oxygen/carbon dioxide balance . That balance has to be okay or U can be affected adversely .
Umm , " netdoctor.co.uk/ask-the-expert/a4338/breathing-in-and-out-of-a-paper-bag/ " . . is a link for this .
hope this helps ,
I've had enough panic attacks ... sheesh . . . . :( ! ! !
-- Paul , Indiana
Good luck and God bless.
Best,
Ray