I remember having a panic attack once.  I thought I was having a heart attack, and then everything was going black, and I thought I was going to pass out.  The trigger was something that I had no control over.  I did not know the Lord at the time, and I tried to manage the circumstances the best I could.  

God gives us the solution for panic attacks,

“So this is what the Sovereign Lord says:

“See, I lay a stone in Zion, a tested stone,
   a precious cornerstone for a sure foundation;
the one who relies on it
   will never be stricken with panic.”  Isaiah 28:16

You need to trust and depend on Jesus for everything in your life.  The result, peace.