YOU SAID:

I didn't know you fisted yourself!

INTO JAPANESE

私はあなたが自分自身を握ったことを知らなかった！

BACK INTO ENGLISH

I did not know that you held yourself!

INTO JAPANESE

私はあなたが自分を抱いていることを知らなかった！

BACK INTO ENGLISH

I did not know that you are embracing yourself!

INTO JAPANESE

私はあなたが自分を抱いていることを知らなかった！