Worst moment was when I was 13, my grandfather was dying from cancer in Poland, we rushed over there, even without notifying the school, to get there.
We arrived too late, he had died the previous day. He was in agony, unable to eat and we never got to see him one last time. I cried so hard. We spent the next two weeks there because of the funeral. Other than my parents and siblings, I was pretty much alone in a place I didn't understand.
The funeral was particularly tough, I couldn't understand a word of it and my mother kept crying which made me cry.
Most unlucky day ever was a few weeks ago, I didn't sleep (literally) and had missed school the day before. I missed my bus, left my Biology work at home (my teacher was particularly angry), had a surprise Physics test (which I hadn't prepared for) and then had a tonne of work to catch up on (I had missed the previous Wednesday and Friday). I was feeling pretty ill the whole day too.
We so need a sing along in a public shower.