Wheel Related Problems of the 2010 Hyundai Santa Fe

Wheel problem

I've had the brakes replaced, alignment done, rotors checked, and it still shakes like something isn't right, and it's scaring me, I'm handicap, and I feel like my front end is gonna come apart or my car is gonna flip, when I'm driving down the road it's doing just fine but when I go to press on my brakes to slow down my car is shaking like I'm going through an earthquake or tornado, and it also seems to have this problem like when you push push the gas to get speed so you could jump on the highway it like jerks a little better she is a little hard to be able to catch up and it's never done that before.