Why does fearing what I'll miss keep me anxious at work?

Your job is real: you're paid to notice what others miss. But somewhere that job fused with your sense of safety. Now every task carries a silent threat — if I miss this, something terrible follows — and you treat worry as the price of being careful. It isn't. Worry doesn't catch mistakes. Attention does. A checklist does. A rested mind does, because a tired one misses more, not less. You've confused the feeling of vigilance with vigilance itself, and the feeling is costing you sleep while adding nothing to the work. You already know what to check. The anxiety isn't giving you new information. It's running the same five fears on a loop, after hours, when you can do nothing about any of them. Build a way of working that holds the job. Stop making yourself hold it too.