what wrong with my car?
#5
I would do a couple simple checks, confirm good tire pressures on all the tires and also make sure all the wheel weights are in place. If you feel everything is in order and nothing suspension/chassis wise is worn out or damaged, then I would call the shop that did the mount and balance. There could always be a slight chance that the tires were not balanced correctly.
#15
your lower control arm is crushed?????? well.. I can only think of one way THAT can happen without hitting something major that you would definitely feel.. and that is if whoever was doing your tires jacked it up wrong... or while up it slipped and landed on the Control arm.