I learned many years ago, you can tell your kid something until you're blue in the face but if hurting or feeling devastated will never hear you; they only hear their world crashing down around them and nothing else.
It's happened with all three kids at one time or another. You can't convince them everything will be alright and never believe you when say in the grand scheme of their radar in life will be a teensy tiny blip on the screen when all is said and done.
I lost my own mother when I was just seventeen, a week before my senior year in high school started. That's a pretty tough time in a girl's life even when you (feel like you) know everything anyway.