To me, your symptoms do not sound like herpes to me. Most people who get herpes do not describe it as tiny red dots that itch. They describe it as a group of blisters that are tender. Yes, they can itch. But it would also not be possible to have a true first infection outbreak 175 days later. We don’t honestly know how much if any impact Truvada would have on HSV. It is possible there could be some impact, but if you are asking if taking Truvada for 28 days would postpone herpes antibody development for 175 days, I would say no.
I think that you have escaped acquiring HIV and HSV in this encounter. First of all, your risk was not high. You used a condom for a lot of the contact, even though it eventually broke. So that’s a good thing. You had the person tested and she was HIV negative. Who knows what to make of her combined herpes test, but not a huge surprise that a sex worker would be positive for HSV.
Your negative tests for herpes and HIV since should be reliable and I think it is time for you to relax about this exposure. It may be hard to let go of this concern over time; you’ll need to work on it.
I would encourage you to have someone look at the rash, just to be sure.
Terri