1 – Am I right to think that this is probably herpes?
No, not at all
2 – I worry this was a recurrence of a July 4th-acquired infection triggered by the sex on Saturday. If so, how likely is it that I passed this to my new partner (assuming she was uninfected before)? We had sex w/ condoms twice on Saturday, once on Monday. She has yet to notice symptoms
The condoms will reduce transmission by 96% so even if you have herpes, which I doubt.
Terri