What would YOU do?

A few times I pictured myself in a situation when a doctor tells me I will be dying soon. The same situation depicted in the excellent movie "My Life Without Me" directed by Isabel Coixet. What would I do? I just get so confused.
A 22 yeard old student who graduated from my High School in 2002 passed away on Wednesday. Last Sunday, she was told she had three days of life remaining. She had cancer. She got married the day after with her boyfriend, at the chapel they have at the same hospital. She died on Wednesday.
Life is very cruel, sometimes. In a situation like that, what would YOU do?