My iPhone 5s won't turn on after charging overnight?

I put my phone on the charger then I went to bed at about 12 PM & woke up at 8 AM this morning, only to find my phone still in the charger but not turning on. Keep in mind that it's a brand new charger that I just got and it worked excellently. I tried the holding down the home button and power button at the same time but it still won't turn on! I don't know what's happening.

Edit* I MEANT 12 AM not PM lol

It probably wasn't even charging when you first connected it, so it just went dead overnight so it needs to be charged. I would get the chord is bad, try a different chord or plug into wall vs computer, etc.