I'm sorry you're going through all this.
Even with the rise, it's still been 3 months since your last test in January. Unless you've had a brand new exposure, that would most likely be enough time do develop enough antibodies that your result would be much higher.
Some people just seem to get low positives on the IgG, and need a Western Blot to sort this out. Did you get a confirmation test with Quest? I can't recall if they do a confirmation test or not.
In any case, if you've not had any new recent exposures, you can get a Western Blot test. Your doctor can order this, or you can go through Terri Warren at the Westover Heights Clinic. https://westoverheights.com/herpes/getting-a-western-blot/