Im confused.

I've had my Iphone for a while now.. Its been in its case and its in mint condition.
All of the sudden I looked at my phone this morning and the screen was black and it didnt respond when I tried turning it on.
So I put it on the charger for 30 minutes. (Usually it shows you the phones charging). Thats not even happening.
I cant turn it on, and its not charging.

What the fuck just happened to my phone?
Is it time for a new one?
I didnt think IPhone just keeled over and stopped working?
I've tried two different chargers and tried plugging it into my laptop, nothing.

HELP!?