YOU SAID:

So far I’m the only one who didn’t know

INTO JAPANESE

今のところ知らなかったのは私だけです

BACK INTO ENGLISH

I'm the only one who didn't know so far

INTO JAPANESE

今まで知らなかったのは私だけです

BACK INTO ENGLISH

I'm the only one who didn't know until now

INTO JAPANESE

今まで知らなかったのは私だけ

BACK INTO ENGLISH

I'm the only one who didn't know until now