The big concern with receiving oral sex from her is the acquisition of HSV 1 from her mouth. But you already have that, so this is not a concern for you. Once you have HSV 1 in one location on your body it is extremely unlikely you would get it in a new location (genital). You giving her 30 seconds of oral sex does not present a substantial risk of acquiring HSV 2 from her genital area. HSV 2 does not like the mouth area much at all and the contact was extremely brief and we don’t even know if she has HSV 2, right? And you did all sorts of things like washing and gargling that may or may not reduce the risk but certainly can’t hurt All in all, low risk. I wish I could tell you there is zero risk. I can’t say that but I can say it is minimal for sure. HSV 1 does not protect you against acquiring HSV 2.
As for testing, your call. If you do test I would recommend testing NOW and then repeating in 12-16 weeks. That way, you have a baseline value to compare against. I know you mentioned that you had tested before – have you had any concerning contacts since then that could have changed your HSV 2 status?
Terri