You can find the light switch in your own hallway in the dark. No hesitation, no thought. That's what confidence looks like once it has been earned quietly — not swagger, just familiarity.
The trouble comes from expecting to feel that way about something you've done twice. Nobody is fluent in a room they've stood in once.
Which changes what confidence has to mean today. Not certainty about the outcome, but trust in something smaller: that you'll cope with whatever happens, that you have coped before, that you know where the switches are in your own life.
That much is already true.