Screen is selecting things without me touching it, how do I stop this?

A

AC Question

Screen is selecting things without me touching it

My SGS4 is opening apps, clicking on things and taking pictures etc without me even touching the screen. It is like its possessed. The bottom two corners are unresponsive to touch. I did the test screens and turned on that little white dot that shows where on the screen you are touching, but I am not touching the screen, and there are a bunch of those little white dots flying all over the screen opening things and vibrating. I recently had my screen replaced, could this be the problem?