Jerking is likely just the road. What are you using for sway control now? Have you confirmed that you have adequate tongue weight and tires aired up beyond what the door jam sticker says?
As long as my P metric tires are aired to their max and the trailer tires are aired to their max, and of course tongue weight is around 12% or higher, I only experience "sway" when a semi goes by. If I use my Equal-I-zer in addition to the above, I experience zero sway. I don't even experience the jerking that's often reported.
On edit, I'm not promoting what I use, just pointing out that there's plenty of options and considerations.