Make sure the wheels are properly balanced and that you are using the correct type of lugnuts for the wheels you have on your car and make sure they are secured. This is a common problem that is over looked when cars do what yours is doing. Replace your axles/driveshafts even if one is only damaged. The other is soon to go. Change those rotors too. You'd be surprised how much interruption that warpness can cause. Do all these things and check back.