A picture would really help a thousand times in this situation.

Though, If I had to guess. I'd say you have something worn on your rear end between sway bar & bushings, lower & upper control arms, lower trailing arm, shocks/struts. Whatever, its pretty obvious its putting too much weight & pressure on them, usually this is due to another part being worn out & putting its load elsewhere.

In this case, elsewhere is your wheel bearings/hubs.

Pictures though please.

Jeff.