Dropped iPhone now only partially responsive?

I dropped my iPhone today from the height of about my knee to the floor. Now the screen has vertical black bars that come and go. I have reset my phone. The screen is responsive sometimes. It will go from not responding to touch at all, to only the left side, to the entire thing responding. The thing is, when it does respond it will start doing ttthings on its own as if i were touching it. (ex. Opening the twiiter app.)
Did i just make a wire loose or did i totally screw up my phone?

You probably broke your phone. See if Apple will fix it for free.