What do you do when doubt shows up right before something important?

I just stand there and check my work again. The unease is usually my brain reminding me something's off—found a loose neutral that way once.

I know that quiet unease. For me it's the two seconds after I step onto the podium, before my hands move—the whole room holds its breath. I've learned to sit with it like a tuning note: don't resolve it, just let it sustain.