YOU SAID:
I just realized that I will be graduating in 20 days
INTO JAPANESE
私はちょうど私が20日間で卒業することに気づいた
BACK INTO ENGLISH
I just noticed that I will graduate in 20 days
INTO JAPANESE
私は20日後に卒業することに気付きました
BACK INTO ENGLISH
I noticed that I will graduate after 20 days
INTO JAPANESE
私は20日後に卒業することに気づいた
BACK INTO ENGLISH
I noticed that I will graduate after 20 days
That didn't even make that much sense in English.