Is there a reason you'd suspect herpes when you're married? You don't mention going outside of your marriage, or suspecting your spouse of doing so, so I'm wondering why you'd even suspect this as an STD.
That said, if it's just a patch, and not blistering, it's not likely to be herpes. It could be dermatitis, or an allergic reaction to the hotel lotion, which always is loaded with fragrances. It could easily be chafing from the shorts when you were on the Peloton.
The only way to know is to let a doctor see it. If you don't have any herpes risks, it's probably not herpes. I see from your previous posts that you already have hsv1, so even if your spouse gave you oral sex, and has hsv1, you can't get it again genitally.