So there is still a chance, but I don't know the odds. The supplemental test coming out positive leans towards you being positive, but it's another IgG test, which doesn't offer a lot of new information.
Why did you test in the first place? Was it just routine? What kind of risks have you had? Who ordered your tests - was it your doctor?
Your next step would be to get a Western Blot test. These aren't that easy to get, but it's possible. Your doctor can order it, or you can go through Terri Warren at the Westover Heights site - she's one of the world's leading experts on herpes. https://westoverheights.com/herpes/getting-a-western-blot/