Then, some things that were helpful for me, and may be helpful for you, ymmv:
- check your health: maybe you suffer from physical issues, such as high blood pressure, and you can help it with pills, which will help with anxiety.
- drop coffee and sigarettes, reduce alcool, eat more vegetables and fruit; it's weird, but it helps.
- physical activity; I spend 1-2 hours every morning a day walking (or running), it's good for both body and mind.
- daily meditation; get a test account on headspace, try it for a week.
- face anxiety-inducing things ASAP; E.g. if you are stressed cause you wrote shitty code, just tell your boss/colleagues immediately; if you fucked up something with your partner, tell them etc. Once bad things happened, you will stop worrying about what might happen.
- "hedge" your anxiety-inducing problems; if you are worried about your family surviving without you, set up life insurance. If you feel incompetente and unable to find another job, spend some time studying something new, and try applying for another position, even if you don't want to take it, you may be able to find something else, or learn what's missing.
Good luck, anxiety sucks.