I am becoming more confident each day.

Becoming is a slow verb and it cannot be felt in real time. Nobody wakes up detecting a two percent improvement in themselves overnight.

The evidence is only ever retrospective. Something that would have kept you awake in April now barely gets a second thought, and you never noticed the crossover happening. There wasn't a day it changed.

If you want proof, keep a note of what is making you anxious at the moment. Not to solve it, just dated, folded into a drawer. Reading it in a year is the only reliable instrument anyone has for measuring this.