Hey!
Sorry that happened.
I haven't had panic attacks for a year now, and I believe I coped pretty well from the start, so maybe my trick can help. At least this is my story and it worked for me.
The first panic attack I had ever, was in 2014, about 6 months after the trauma incident. I actually called the emergency room, fearing I had a heart attack, and it was really terrifying that first time. But then I learned that a typical panic attack IS that terrifying and that painful, but not dangerous, and that it will last for approximately 20 minutes, unless one gets scared (then it lasts longer). So, I made it a habit to just lie down on the floor with my feet on a chair and watch the clock, counting seconds, for 20 minutes until the attack passed. It wasn't too bad after that, more like an annoyance, except when I was at work, and had to lock my office to lie on the floor for 20 minutes while employees knocked on my door, that was bad....
I don't know if this is the way to handle panic attacks for everybody, but for me it made me feel in control (I'm a bit of a control freak) and thus it just started happening less and less frequent, until one day it was gone again
