how long after exposure did you test? Was IGG type specific test? What were the numbers, how high was it?
There is no such thing as "being exposed" versus actually having it. If your IgG is high (and I'd love to get that number), then you have it. Herpes isn't dormant. Whether or not you have symptoms, or recognizable symptoms, the virus is active in your body. You can still transmit it with asymptomatic viral shedding.
Was your test a type specific IgG herpes blood test? Did it give separate results for type 1 and 2?
The IgG being positive just means that you were infected at some point in the past and your body has had enough time to develop antibodies. This can take up to 4 months, but most will within 6 weeks. It can't indicate when that was exactly, or recently or years.
I'm a little confused about your testing - your swab was negative, but your blood test was positive? I'm not sure if "blood work nd a swab year done" is a typo, or if you had testing done a year ago and again recently?
You should absolutely read the Herpes Handbook. It's free and written by one of the world's leading experts on herpes. https://westoverheights.com/wp-content/uploads/2014/08/Updated-Herpes-Book.pdf