Brakes my brakes are hard to push and the car shakes

You likely have warped front rotors ... if you are a do it yourselfer then you can buy new rotors rather cheaply now .. you could have your old ones turned (resurfaced) but present chinese made rotors arent a lot more and i have had good luck with them .. you, of course, have to also change the front brake pads .. now there is a big difference .. i have had very bad luck with some pads from even big name auto parts stores .. most pads today have a metal particle fill .. that increases pad life and reduces pad temp .. but in the cheap pads i often see non uniform distribution of the metalic particles .. this really tears up the nice new rotors .. so i say forget the cheap chinese pads (most are) and buy good pads like wagner .. they cost more but are worth it .. if you cant do the work yourself then you might ask a mechanic if he will install the parts you buy .. that way you will know you are not getting junk and they will cost about half of what he would charge .. .. your back brakes should be inspected .. they last a lot longer than the front but should be replaced before about 60,000 miles (see your service schedule)

Your routers are going bad or your pads need to be replaced.
More than likely its your routers see if you can get them resurfaced at a shop.