[drowned12]

If you have alloy wheels (which you probably do), you can take a flashlight and look at your pad thickness. In 15k miles it's unlikely they're worn down, unless it's the rears on a pre-2010 (I drive hard and my pads are projected to last 15k miles based on what I saw after 5k miles).

It's probably just squeaky brakes...happens when they're cold. You should hear how much noise slotted rotors make