I have severe issues with anxiety as well, but mine stems from a Borderline Personality Disorder that developed as a child as a result of abuse at home, abuse at school and bullying outside of skill. It was ingrained in me that I am good for nothing and when things go wrong, I freak out and start having panic attacks which send me into full blown rapid cycling. I have it ingrained so badly in my head that I am good for nothing I actually expect to fail at almost everything I do. Funny thing though, with the combination of my own unique spirituality and using a number of types of anxiety reducing methods(One being DBT which is loosely based on Zen Buddhism), I am actually able to cope better. Spirituality is personal and can be a wonderful thing if a person learns to identify what your true beliefs are. Just as case and point, I am prescribed Ativan for anxiety, to take as needed. I took 1 mg on Thursday, and it was the first I took in over 2 months. I have started to focus my anxiety and channel it into the positive. It has drastically improved my bowling. Instead of having to take an ativan before or during to calm myself down I channel it into my game. It doesn't always work, but I did get a 612 series one week(having a 223 and 222 on my second and 3rd game). I've had a number of strong weeks as a result of rechanneling my nervous energy.
I hope this helps. I just want you to know that there is reason to have hope, that by learning how to harness your nervous energy you can actually be more productive and more successful in your life. Good luck.