YOU SAID:

Me: I've cried because I've been worried about them before.

INTO JAPANESE

私：私は彼らのことを心配していたので泣いた

BACK INTO ENGLISH

Me: I cried because I was worried about them

INTO JAPANESE

私：彼らが心配だったので私は泣いた

BACK INTO ENGLISH

I: I cried because they were worried

INTO JAPANESE

I：彼らは心配していたので泣いた

BACK INTO ENGLISH

I: They cried because they were worried

INTO JAPANESE

I：彼らは心配していたので泣いた

BACK INTO ENGLISH

I: They cried because they were worried