My laptop won't turn on???!!!!?

I was about to go to bed and shut my laptop off when I realized the battery said it was plugged in and not charging. I looked up some things on google and they told me the best solution would be to shut my laptop off, take the battery out, press the power button to release energy, put the battery back in and turn it on. But after I did that, it won't even TURN ON! No lights anywhere, no sign it even works, NOTHING!! I AM FREAKING OUT!!! WTF happened???? omg, someone help me, all my school files are on it, I can't even beleive this is happening to me!!