I did my brakes about 4 months ago, then the car sat. I started driving it again last month and noticed that it shutters when I come to a stop. Not really having anytime with a fresh new baby I have kind of let it go for a while, but its now getting worse. I also can't remember if it shuttered before I did the brakes or not. I didn't turn my rotors....could that be the source of my problem?