so i dropped off my cousin at airport tonight. on the way there my break was fine and no abnormal noise came out of it. when i got back in to the car and took off, i went to brake and the whole car started to shake. I can hear my front and rear passenger side breaking and it sounds like there is no brake pad on it and the ebrake is up. i got out of the car and check all four rotor and it seems like it's grinding away all four of them!! i drove my car really carefully and parked it at my sisters house. now i got a question, how long does a stock brake pad last? and will this be under warranty? my car has 22000 miles on it.