6 weeks should be fine. Here in Australian STD clinics (or at least the one i went to) they told me that 5 week test results are 95%+ conclusive, also, the doctor and nurse said they had never seen anyone seroconvert past this.
Good luck if you decide to get tested at 12 weeks though :).
whatever it is...a test at 3 months is the recommended one..6 weeks is very encouraging..
I can almost promise a 6 week neg will not change. Get a final test at 90 days and stop testing.
All are saying the same, get a final test at 12/13 weeks. The probability for a DUO test at 4,6 weeks turning positive are remote, if your exposure was typical very very remote.
don't listen to mitm. joecool21 is right test a 12/13 weeks.
listen; my doctor told me every thing is possible medically,some with all symptoms may get neg result and some with out symptoms may get pos result...
just get tested
ie never seen anyone in this forum test positive after a 6th week neggie. take another test on 12/13 week an move on good luck.
Joe