This started with the 5.0.1 upgrade/download. Hard reset has not helped. Is there any way to revert back to before the 5.0.1 download like a system restore option on a PC?

Last week, I upgraded my iphone to the latest 5.0 os that popped up on itunes when i synched; since that time, when I go to talk on my phone, it doesn't recognize that I'm talking, and my face is constantly activating different buttons on the screen/touchpad. I can't freaking talk on my phone...