iPhone power button stuck

My iPhone 4S power button is stuck. It isn't sticky or anything, just stuck? I've tried all the tips and tricks, but nothing seems to work. & my iPhone keyboard suddenly stopped working for no apparent reason?

I have a lock on my phone, so I can't get in it because the keyboard doesn't work. I can see the keyboard, and everything, but will not type. I can't even click on the Emergency Call either, and I also can't restart it because my power button is stuck.

My phone has also been frozen a couple of times too, while my iPhone was power button was stuck, but managed to fix that on my own.

Anything I can do about this? Do I visit an Apple store and exchange for a new one? Or will they repair it? Help?!