Thank you for your response. She did mention hsv1 but he's never had a cold sore in the 20 yrs we've been together and neither have I.. It was painful peeing for like 2 days after and I'm assuming it's because she made it worse by culturing it, but now I feel fine so it just seems odd. Could a herpes sore heal in 3 days with no treatment?
What you describe doesn't overly scream a herpes infection.
If it is, then it could easily be from your husband's oral cold sore infection (pretty likely he has one) transferred during oral sex. Outbreaks of genital HSV1 after the initial outbreak are few and far between, so this is a possibility.
Either way, no need for concern regarding fidelity.