Breathing may help
Part panic attack is the vicious cycle of co2
& o2 imbalance from shallow panting-like breathing.
Blood chemistry gets out of wack. A few powerful full exhales (make grunt noise) followed by a series of nasal full expansive inhales. Hold - then full "whistle-like" exhales. Good luck! link: http://www.Anxietycoach.Com/breathingexercise.Html.