I had the same issue today at school. I
dropped my phone once more, and the screen popped out in the left corner. Thinking I needed to replace the screen and call in Apple to deal with the hassle, I called my brother for some help.
No need to turn it into the store, all you need to do is pinch it back into place. Yes, I understand it sounds quite like it would break it, it actually works. If you pinch it hard enough into its place you should hear a pop and it should be back to how it was. I hope this helps out a little bit and it saves money and time for you guys needing to know how to fix this situation.