[Huffa]

Before I go any farther do you know if you have drums or disc in the back?

Alot have disc all the way around ("4 wheel disc") while others have disc up front and drums in the back.

Look up front through the rim and then look at the back and see if you can see the disc. If they look different (don't see much of anything in rear) then you have drums in rear, the same as front then you have 4 wheel disc. A disc is thin plate of steel about 12-14" or so round. The brake pads compress against the disc to stop your car.

Drums have brake shoes in that expand against the drum when brake is applied.

Driving that long (how did you not notice??) I'm sure you super heated the pad or shoe up so hot that the heat hardened the material compound of them which sort of put a glaze on the surface area. I don't think they will go back to normal...you might need new pads-shoes but you could try sanding them. You might of even distorted the drum - disc roundness, I'm just not sure.

Again, I'm no expert and this is only my theory.

Not sure about the disc-pad thing, just ask a neighbor to take a look.