Car shakes in park

While driving badly engine light flashes and stays auto track and abs goes off when hitting the smallest of bumps get in car turn it on it putts almost to the point of stalling put it in drive when it quiets down and then it vibrates badly did it for a while now put gas treatment in thought it might be water in gas nope it would run fine after a while now its is just bad engine light now comes on and the car if u hit a bump or a crack in the road the auto track and abs goes off im at a loss and a job soon this car is the bain of my life right now!