What is causing my car to do this?

I have a 1990 Toyota Camry, and I just got my front right tie rod fixed, because my car was wobbling. But when driving around 40 mph my steering wheel will jerk me towards the left, sometimes is will jerk me towards the right also. And when I barely turn my steering will it will pop me left or right really fast, that can't be normal. I was told that I needed a new lower control arm busing, what is that? And what does that do? Could it also have something to do with needing an alignment?? Also another problem. When I go to accelerate my car hesitates really bad, like trying to go up from 20 to 20 mph it won't go. Now I have been told three different reasons for that, the gas dials or something are set wrong, I need a new gas timing hose, and it could be the timing belt. I have looked on the internet and seen that my car could need a new fuel filter. I really have no clue. Any help or explanations?? Thanks.