You have made thousands of decisions and you are still here, which is a track record most people refuse to read.
The mind keeps a lopsided archive: three bad calls from years ago, filed near the front, and almost none of the hundreds that went fine. Nobody remembers the flat they chose well, the job they turned down correctly, the friendship they kept when letting it lapse would have been easier.
Trusting yourself is not a leap of faith. It is a fairer reading of evidence you already hold.
Name one decision you got right and have never given yourself credit for.