First of all, we have no idea that you are actually infected as I assume that you didn’t see anyone when this bump was there for a swab test. Second, it is unlikely to acquire HSV from drinking from a glass with someone with an active cold sore but it’s possible, though unlikely. Third, the IgG test for HSV 1 misses 30% of HSV 1 infections, compared to the gold standard herpes western blot.
So you’ve come to quite a few conclusions that may or may not be accurate.
Have you developed sores on your penis?
I think unless you have sores, your conclusions may not be accurate. I would recommend that you repeat the IgG test in 6 weeks and see what happens. There is nothing that you can do right now.
Terri