If you only had oral sex with this person, you could NOT possibly have an hsv2 infection on your penis. You doctor may have to go back and redo med school and pay better attention during virology class.
Blood test usually aren’t conclusive for at least 3-4 months from what I hear on here. So she had oral hsv2 ? Because unless your penis touched her vagina, your not going to get gential hsv2. It could be that she has oral hsv1 which is common and she gave that to you. Also the doctor should swab the sores. If I were you I would go back or get to a dermatologist ASAP and get a pcr swab.