YOU SAID:
you won't believe what Jamie said to me
INTO JAPANESE
あなたはジェイミーが私に言ったことを信じない
BACK INTO ENGLISH
You do not believe what Jamie told me
INTO JAPANESE
あなたはジェイミーが私に言ったことを信じていない
BACK INTO ENGLISH
You do not believe what Jamie told me
That didn't even make that much sense in English.