YOU SAID:
I haven’t seen another person in a week
INTO JAPANESE
私は一週間に他の人に会ったことがない
BACK INTO ENGLISH
I have never met any other person in a week.
INTO JAPANESE
私は一週間に他の人に会ったことがない。
BACK INTO ENGLISH
I have never met any other person in a week.
That didn't even make that much sense in English.