You could have flu like symptoms with either new HSV 1 or HSV 2 infection. How long ago was this?
You most definitely need a swab test from the lesion and I would also encourage a type specific IgG antibody test for HSV 1 and HSV 2. And I would encourage you to do it today and also I would ask them to use PCR rather than culture if possible. Do NOT test for IgM, though. If this picture was taken today, I would think there is a good chance you could get a positive swab and have it typed (be sure to ask for typing). If you can’t get into your regular provider, I would go to an urgent care clinic. You might call ahead and ask about the PCR swab. They can look up herpes PCR in whatever lab book they use.
Did you also kiss this person?
Terri