I had a similar issue at that age.

After a lucky coincidence, I learned I had severe sleep apnea. Treatment for that calmed me down a lot.

Panic attacks returned later when I had a very high-stress job and a murderous commute. I was desperate for help. At that time, I learned of something called EFT, or Emotional Freedom Technique, AKA "Tapping". It uses tapping on acupressure points to address various issues.

EFT really changed my life. It took some time and some practice, but I found it to be highly effective for dealing with anxiety (and other stuff).
One of the best things -- there are lots of free YouTube videos that you can use. One good example: https://www.youtube.com/watch?v=2ig6QRNUTdY&pp=ygUXanVsaWUgc2NoaWZmbWFuIGFueGlldHk%3D

Give it a try. I know it seems weird at first, but more and more people are getting good results.