Some anxiety is normal in life - but 'we' don't want to feel ANY anxiety. And 'we' tend to intensify our own anxiety when it appears even in a minor form. You are not alone.
As you get clean try and remember that anxiety might not ever be completely eliminated, but anxiety levels can become manageable, tolerable, and acceptable.
Don't expect perfection, bliss, and total peace - endure some anxiety, it is natural.
Keep coming back.