I've got terminal cancer in the US. I'm looking at the prospect of losing my job, which means my health insurance, which means I'll have to stop getting treatment and die. I feel you about constant anxiety. Might I first suggest you realize you're human and that where you're at isn't some crazy abnormal place right now.
I've had times where I've gotten frustrated because with a literal deadline I'm still just too tired to get things done and I beat myself up over things I can't control so it's easy for me to negate the small progress I make because I'm comparing myself to a healthy version of myself.
I'm glad to see that you are in therapy. It's going to feel like some days you get nowhere. Remember that any goal you're trying to attain that's difficult is like climbing a mountain. The higher up you go the harder it is to see all the individual steps it took to get there. With life once you get to the top of one mountain, there's always another mountain to climb. It's a journey not an objective.
There's a Buddhist saying that's helped me when I get frustrated at myself for getting set back."Begin Again". Get stuck on something, begin again. Life intrude on your learning for a bit? Begin again. Lose everything in a terrible storm ? Begin again.
For reviving the love of coding, I suggest doing something you either enjoy with coding or something you see as having purpose. Make it small as a project, then break it up into smaller parts. Start with the hard part. When you get frustrated work on something easy or give yourself some time to just think on the problem. Is there a different way to view it, are you trying to be too complicated, what would it look like if you could be absolutely sure it would work, are there smaller tasks this could be broken into that would be easier to solve apart?
You're worth putting in this effort. You can do it. Love and light.