Found out my positive herpes test was a igG test

I got some news and I need a bit of help figuring this out. So my blood test for Hsv was negative but my culture was positive >2.27 for Hsv 2. I now know that a positive IgG just means that I was exposed at some time in my life not infected. Can someone provide information about the two types of positives for IgG and Hsv or is there a difference 

You know you can get pops on your skin if you used the same clothing as someone that's infected