I had 3 false negative swabs. I was in the military when I got it and at that time they would not do a blood test for herpes. 27 years later I had an IgG that confirmed HSV2. So it is possible to have a false positive also. As for the IgG, if it is still negative after 16 weeks chances are good it is not herpes. Have you been to more than one doctor or clinic? If not you may need another opinion. You may have to try an Infectious Disease specialist or maybe a dermatologist.
As for HPV, as I understand it there is not really an effective method to test men for it. Usually, warts are the common symptom a man will show for HPV, if he shows any symptoms at all. Of course, consult your doctor about this. If what you have is not herpes it would still be nice to know what is going on.
Best of luck to you Robdarko