Cracked Touch Screen, Touchscreen not working properly

My One Plus One fell a few feet and the corner is now cracked a little bit. Whenever I turn my phone on, the touchscreen has limited functionality and won't let me tap some stuff- for example, my passcode is the shape of a box, and it will only let me swipe part of the box in. It also won't let me tap the home screen, the menu, or the back button, but it works fine in other aspects. However, I still can't get in my phone because I can't swipe in my passcode. This is extremely frustrating and I'm still not sure what this has to do with the crack. Is the sensor partially broken, or does this have nothing to do with my screen whatsoever? I should add that I only noticed the crack when the phone stopped working, as I drop it often and I'm not positive it's the cause of the problems. Help.