오늘은 나쁜 하루였어요.
우리 고모가 병원에 있어요... 난 너무 슬퍼요 :'(
고모, 얼른 나으세요.

I think It is natural without adding a few words.

Good ^_^ I hope your aunt get well soon!

우리 with family and family things.
ex. 우리 엄마, 우리 집, 우리 고양이
제 with personal things (a family member isn't yours and yours alone haha)(BUT NOT BODY PARTS)
ex. 제 친구, 제 이름

(My answer from here: http://www.italki.com/question/300836)

오늘은 나쁜 하루 - "Today bad day"

오늘은 나쁜 하루였어요. - "Today was a bad day"