Why does my Chrysler 200 squeak when I break in reverse?

I have a 2011 Chrysler 200 that I bought exactly 1 year ago, brand new. It only has 14,000 miles on it. So, I would be very upset if the breaks already went bad, and I hope that's not the case, as money is tight.

Whenever the car is cold, the car will squeak when I hit the breaks going in reverse. They never squeak when I hit them going forward. Also, if the car is warm, the breaks will not squeak at all. It's a very high pitched squeak, though. Again, it only happens when the car is cold and I hit the breaks going in reverse. Does anybody know what the problem might be? Thank you so much for your help.