Overheating screen issue!

[shophiaholic]

I noticed that my phone was starting to overheat when I talk on it a lot etc...

and then out of the blue today, a weird filmy iridescent rectangle has glazed the screen!!! the phone is still functional and I can still see the stuff clearly but it definitely should NOT be there. Is this an effect of the overheating?

What should I do??? Does anyone have the same problem? Does this warrant a replacement? Please help!!!!!

I'm going back to school in Pennsylvania on Sunday and it would be awesome to be able to fix this before then....thanks!!!