At 5 weeks after exposure, the test is somewhat less than 70% accurate – that is, at 16 weeks, there is slightly less than a 70% chance that the results will be the same as they are now.
If you continue to have sex with the woman not known to have herpes, I would very strongly suggest that she get tested for herpes in spite of bad advice (IMHO) from her doctor.
If indeed the second woman does not have herpes and that’s a big “if”, I think her risk is low since you used a condom with the woman who does have hereps and you only had sex with the woman with herpes 3 times. I think the risk is minimal but not zero. I am actually more concerned about the untested woman having herpes and not knowing it than I am about you having protected sex with a woman known to have herpes. Your call!
Terri