YOU SAID:

yesterday i was doing nothing as always but then yesterday which was today back then ended so today became yesterday

INTO JAPANESE

昨日はいつものように何もしていませんでしたが、今日だった昨日は終わったので今日は昨日

BACK INTO ENGLISH

I didn't do anything yesterday as usual, but today was yesterday because yesterday was over

INTO JAPANESE

昨日はいつものように何もしませんでしたが、昨日が終わったので今日は昨日でした

BACK INTO ENGLISH

I didn't do anything yesterday as usual, but today was yesterday because yesterday was over