I am confident and able to handle any obstacle thrown in front of me.

Handling something and feeling calm about it are different skills, and only one of them is actually required.

Ask anyone who works in an emergency department. Hands steady for the twelve hours, shaking in the car park afterward. The shaking is not a verdict on the twelve hours. It's the bill arriving once the work is done.

Confidence, the useful kind, is a track record more than a mood. You've already come through things that looked unsurvivable from the front and are now simply part of your history. Whatever is waiting this week gets added to that list, probably while you're still nervous about it.