I recently had a brief (30-60sec) genital to genital encounter with another man. Although he claims to be disease free, I am concerned about herpes. Assuming I do not develop symptoms in the next two weeks, I still want to be tested so I can be sure. I've read conflicting reports on blood tests, like IgG, specifically on false positives. How accurate are they? Again assuming no symptoms develop, how comslusive would a negative test be at 6 weeks?