ATKINS DIET?! TERRIFIED..TEN POINTS?

I am fourteen, 5'1 and 125 pounds. I would like to lose 15 pounds before my graduation in three weeks. I know its going to be hard. But I recently found the Atkins diet and you can lose up to fifteen pounds in the first two weeks. But I'm scared because I recently read about a teenage girl who died because of the Atkins diet. I know I shouldn't lose this much weight in a that amount of time but I really need to for my graduation. I have already lost forty five pounds, I just can't seem to get the last fifteen off! What do you think of the Atkins diet? Is it safe for a teenage girl? Thanks!