YOU SAID:

But my confidence is wearing off

INTO JAPANESE

しかし、私の自信は衰えています

BACK INTO ENGLISH

But my confidence is declining

INTO JAPANESE

しかし、私の自信は低下しています

BACK INTO ENGLISH

But my confidence is falling

INTO JAPANESE

しかし、私の自信は落ちています

BACK INTO ENGLISH

But my confidence is falling