Confused about diagnosis

[raw77]

I am an uncircumcised male. I saw blisters that eventually turned into lesions on one side of penis in November 2007 and went to see my doc who advised me that it looked like herpes.I was put on valtrex and did  a blood test three days after and the Igg and Igm results came back negative.The blisters came back about a month after and then i did a culture and results came back three weeks ago revealing yeast and staph bacteria.I was given diflucan for the yeast for me and my girlfriend and augmentin 625mg for the staph.Meanwhile on treatment the blisters came back on same side of penis but moving closer to head of penis.My girlfriend also did a blood test-results came back a week ago showing positive Igg test.So i also did another blood test and am awaiting results.I have always had unprotected sex with my g/friend unless there is some indication of blisters just to be safe even though i have read that there can asymptomatic transmission.My question is: is it possible for my girlfriend to be hsv positive and me negative?and is it that her test could be flawed?Thanks in advance.

[gracefromHHP]

i responded in the herpes forum.