Nikon Coolpix won't turn on?

I have a Nikon CoolPix camera, but i haven't used it in ages because I got an Android. I wanted to use the Nikon for prom pictures TOMORROW, so I plugged it in the charger and it doesn't appear to be working. I hold the power button, even when it's still plugged in, and it won't turn on. The only thing that is happening is the little green button next to the "flash" symbol keeps blinking when it's plugged in. I know that batteries sometimes go bad, but it was fine a few months ago, and now it won't do anything. Even when it is plugged in, it won't turn on, so this might not be a battery problem. Does anyone have any idea whats wrong/what I can do to fix it? And the suggestion, "Go buy a new camera" isn't really helpful in this scenario…

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