I am not sure this is the answer you are looking for
It really won't. You should have a strong positive igg score forever. Hsv1 can be tricky as the test isn't as sensitive and can miss some infections.
Can low the igg go after a positive result?
You can take another one at 8 weeks. 75% of people will test positive by then. 12 weeks is usually conclusive for a negative result.