suspension question
 

you guys think that my suspension could have gone bad. i got into a car accident and i hit the rear right side onto the gaur rail at like say 35-40 at the most. now the right sit like a inch lower then the left. you think that there something wrong with the shocks? and the brake started to squeak to and before that i just changed the brakes and it was fine. so you guys think that the squeaking noise is the brakes or the supension?