I had anxiety for many years, and cured it by meditation.

But what you speak of, for my personal experience, is not anxiety.

Anxiety is when I am out and have too much coffee, and I feel like I'm going to pass out because the body feelings are causing me to freak out. Or I got too high and am panicking. It's an overreaction to sensations and experiences that I am unfamiliar with.

What you talk about, that crushing feeling when trying to do work, pure fear and avoidance, is much more in line with what I experience from my depression.