Yes, you may not have the virus, correct. With an equivocal result, it is really not possible to know right now if you are making antibody due to a new infection or its not positive, period.
Sometimes negative people DO get equivocal results, certainly.
Figuring this out involves waiting and retesting, no way around that. I do not think your equivocal is due to the previous partner but could be due to the person who tests HSV 2 positive now.
If you were our patient, we would likely test you in four weeks and see where things stand. If you are still equivocal, then I don’t think you are in the process of developing antibody due to a new infection or it would very likely be significantly higher. If it is still equivocal later, then I would probably recommend a western blot at 16 weeks post last sex with this person.