2004 Saturn Ion The car just began wobbling pretty seriousl

The car is a 2004 Saturn ION which I purchased from a used car dealership. The car came with a clean carfax report. A few days after I bought the car I noticed a banging sound under the floorboards, so I took it to a dealer they checked it and replaced some bushings. I was told to have a seal replaced as it was leaking but was about to move. As soon as I moved I had the seal replaced by the Saturn dealer in my new town. When I went to get the car they told me the bushings should be replaced soon and I told them they were just replaced, they dropped the subject and I brought the car home. After a few more days I began noticing the sound again, but barely and only when I turned sharp curves. The sound has intensified and when I turn a sharp turn now there is a clicking sound up front. I drove over some rough (very rough pavement) on my way to a park yesterday, and now the car has a terrible wobble and the steering wheel is shimmying. Could this be the bushings? If so should I call the dealer in my old town to check on a warranty since they were installed almost a month ago exactly?