iPhone 3GS Black Screen and Unresponsive after being dropped

Last night I dropped my iPhone 3GS, and the screen was black and wouldn't respond to anything. I left it on the charger all night, and nothing happened still. I connected it to iTunes and it recognized the iPhone, but in protection mode. I tried restoring it, the screen turned white and it wouldn't restore. It says unknown error occured. Then after awhile the screen turns back to solid black. Nobody can call, it won't vibrate or really do anything. I love my iPhone and really want it to work again. Is it a possible fix or should I just give up?