I had a massive anxiety attack after my accident that lasted six hours, it was horrific. I swear a strong coffee set it off so I avoid them now. I went for a walk to burn off the nervous energy, had a cold shower (this really helped), and just told myself that "it's only temporary" (that became my mantra). On tip that really helped was holding my breath! So many people try to "control" their breathing during an attack that they make themselves worse. Attacks happen cos basically u r breathing out more carbon dioxide than you are inhaling, so stop breathing out! I held my breath for 14 seconds and did 5 sets. It seemed to work for me. I then breathed in thru the nose for 5 seconds, held it for 3 seconds, and then exhaled thru the mouth for 7 seconds. It's a very scary experience and I think everyone deals with it differently, it's finding your comforts. I would say bare in mind that u aren't in any real physical danger. Good luck.