For what it's worth (and I'm not sure if this relates to your situation), I found that accepting that my constant anxiety was a symptom of long covid (rather than something in my real life) helped me cope. Early on, I kept latching on to something in my current (or earlier) life that would explain what I was feeling. I realized that I was searching for an explanation, rather than realizing that long covid created a subjective experience unrelated to objective reality.