YOU SAID:

we didn't get married three months after that event

INTO JAPANESE

そのイベントの3ヶ月後に結婚しなかった

BACK INTO ENGLISH

I did not get married three months after the event

INTO JAPANESE

私はイベントの3ヶ月後に結婚しませんでした

BACK INTO ENGLISH

I did not get married three months after the event