Question: Hi, About a year and a half ago, I spotted an open sore on my genitals. I spotted this sore after having intercourse with my GF and she broke out as well. I haven't any relations with other people for a year and half before this time. I went to the doctor and got tested for everything under the sun she did as well. All test came back negative for all STDs and HIV. I swabbed after that and tested positive for marsa staff infection. The doctor gave me antibiotics and it went a way about a month ago The same single sore showed again it started as a very light irritation to where I thought it was nothing, but when I looked the little sore was there. I applied A&D ointment to it after showering and in the morning no irritation and it healed quickly. I wanted to go back to the doctor but didn't have time and didn't to go through all the testing. My Girlfriend has recently gotten the same thing and I now I need to know whats going on? I did plenty of research on what it could be. The first thing I thought was herpes but from pictures and symptoms they are nothing alike which is what my doctor told me when I got tested the first time. I would appreciate any helpful answers. Thank You
P.S. No intercourse took place when the small sore was noticed recently.
A few errors in the question. My Girlfriend and I were tested for all STDs including herpes 1 and 2 while the sore showed up on us about a year and a half ago, we tested negative for all test. I was tested positive for marsa staff infection at this same time. I was treated with antibiotics and it went away within 10 days after as well as my Girlfriend.

Recently, it came back just a singlle sore like last time and it went away within a week or too with no antibiotics just A&D ointment. A single sore just showed up on my Girlfriend as well just like the one I had. When spotted no intercourse has taken place.