What about due to masturbating her?
Hi, white spots on your anus are not indicative of herpes. They are not white but clear and a first time outbreak would be at point of skin exposure when using a condom like your pubic mound area if it made rubbing contact with her genital area. If not lip contact or genital contact was made, you had no risk for any std including herpes.
No std symptom happens the next day but takes a week to develop. Having your penis covered would prevent any germs from entering so your urinating issue is not related to the act.