I have a sway bar installed. I still feel like i am getting to much sway.
The fact that you installed "a sway bar" tells me the problem is probably your cheap WD hitch. You need to throw it away and start over. And this time skip the hitches that use sway bars and cost less than $500 and go for an Equal-I-Zer or Reese Strait-Line or Husky Center-Line or Blue Ox. Ignore the less expensive WD hitches from Reese, Husky and Curt. For a Reese WD hitch, if the doesn't include "strait-line" in the name, that's not the good one. For a Husky, if it doesn't include "center line" in the name, that's not the good one. I've never seen a good Curt hitch, only the bottom feeder cheap ones for less than $500 discount price from Amazon or ETrailer. Equal-I-Zer and Blue Ox don't make the cheap hitches, so if you get an Equal-I-Zer or Blue Ox with the correct tongue weight rating you'll know you got the right one.
If your trailer can gross 8,000 pounds, then you need a minimum of 1,000-pound spring bars on your new hitch, and 1,200 pound spring bars won't hurt a thing. The Strait-Line comes with 800 or 1,200 pound spring bars, and 800 is not enough so you need the 1,200. Equal-I-Zer can be ordered with 1,000-pound spring bars, which is 12.5% of your 8,000 pounds trailer weight. That's the average tongue weight, but your TT might have more up to 15% (mine does). So whether Strait-Line or Equal-I-Zer or Husky or Blue Ox, I would go for the 1,200-pound spring bars for your trailer.
Here's the one I have, and it works great. Note that this one will handle any tongue weight between 700 and 1,200:
However, any WD hitch has to be set up and adjusted properly or it's not going to do a good job of distributing the correct amount of weight and controlling sway. My Strait-Line is set up correctly, and does an excellent job on my 7,000-pound cargo trailer.
If you hate the possibility of uncontrollable sway as much as I do, then you'll spend even more for a hitch that guarantees absolutely no sway. For my TT I have a ProPride hitch. No sway with that puppy, but then it's not cheap,
If you can't stand the thought of spending over $500 for a good WD hitch with good sway control, or over $2,000 for a ProPride with excellent sway control, then a patch might be to add a second sway bar to your current hitch. One sway bar may not be able to handle the wiggling of an 8,000-pound trailer, but two might be better. Not nearly as good as a Strait-Line, but better than what you have now. In addition to the second sway bar, you'll also need an additional tab on the ball mount to attach the second little ball where the sway bar connects to the ball mount.