If you’ve never had a cold sore in the past, it isn’t possible to know if your HSV 1 infection is oral or genital but your symptoms of the bump sound nothing like herpes. And no, I don’t believe the antiviral made the change. your positive was just barely positive the first time so the difference is very minor indeed. If you would prefer greater certainty, you could do the blot but I suspect it will be negative based on what you’ve said so far.
Terri