My Iphone won't turn on or charge or plug in the computer?

So I dropped my phone like 3 days back and it had still been working fine other than the cracks in the screen but then the other day I was playing video games so i set it down and it got lost in the blankets when I went to look for it I grabbed it and it wouldn't turn on it was just a black screen. I plugged it in the computer the computer didn't recognize it as anything and it wouldn't work at all.
Is there a way I can fix this? Or should I just get a replacement.

Same thing happened to me yesterday, now what you can do is hold the home button and power/sleep button together for 10-15 seconds and if/when the apple logo appears, plug it into wall socket charge and i think youll be fine except your cracks!