Car sometimes shakes violently when braking at high speed, sometimes it shakes when just accelerating without applying the brakes, the steering wheel also shakes and the car moves to any of the sides when I leave the steering wheel, I am sure it's not the brake rotors or pads because I checked them with the mechanic and I also replaced the 2 outer CV joints, what might cause this, I read on some threads discussing that it might be something related to the steering system (I replaced the PS pump and now the steering wheel became heavy again) but there's no sound coming when I turn the steering wheel, so I guess it isn't the PS pump unless it gone bad again due to a steering system failure, please help me know what's going on

just in case someone have the same problem, It was just the front brake rotors/discs, after replacing them the problem was gone but now I can hear some weird noises even when braking at low speeds, they told me that this is normal "nearly all of the brake pads in the market here makes those noises"

and I know that I still have alot of jobs regarding the steering and suspension because I can feel some issues still happening
I will check on these parts (tie rods,ball joints,steering rack,control arms,struts mounts)

Its the front discs. Happens when you take too long to replace front brake pads, and they start grinding on discs. Frequent heavy braking at high speeds can also cause it.