I dropped my iPhone 5S onto a hard floor today. After that, the screen was messed up. I could see a bit of extra light shining onto the top right of the screen. The right side of the screen has lost touch capability - when I touch the 4 icons on the right side, nothing happens. I can touch the other icons though. Sadly, I have my Settings and my Phone icons all on the right side, so I cannot access those. Also, sometimes the screen goes crazy now. If I try tapping it, it acts like I'm tapping it a hundred times, opening and closing random apps, and entering random keystrokes into text fields. Any idea if this might be an easy fix (not sure if maybe a cable inside just came loose, or if the problem is more serious than that)? How much does it cost to repair a problem like this?