What is going on with my brakes?

Did you change the brakes on the rear axle also?? You might have needed them and changed them on the front, but if you did not check or change the rear ones that could be your problem. Sometimes the brake caliphers will get buildup and one of the pistons will not be retracting after you have applied the brakes and it can hold that pad against the rotor and wear it out in just a few days. It would be like driving with your foot on the brake. If you have a loud Squeaking, then something is definitely wrong and you need to get it checked out.