Welcome to the forum. Thanks for your question. I also scanned your discussions on the community forum.
Given your HIV test results, your continuing concerns about the sexual exposure are now irrelevant. In judging whether or not someone has HIV, test results overrule all other considerations, as long as testing is done sufficiently long after exposure. That interval is 4-8 weeks, depending on the specific tests(s) done.
In your situation, the negative duo test at 20 days was somewhere around 99% reliable, ane the repeat negative at 6 weeks (44 days) nailed it: for sure you didn't catch HIV. It doesn't matter what symptoms you had (and in any case your symptoms really don't suggest a new HIV infection) or how high risk the exposure may have been (yours was essentially zero risk, as your GP told you).
For these reasons, how long HIV can survive on inanimate surfaces, or whether a used condom carries any risk, are entirely meaningless exercises. No matter how high the risk might have been, your test results prove you weren't infected. If you are interested in why official advice is usually for HIV testing at 3 months despite reliable results much earlier than that, take a look at the thread linked at the end of this reply.
For those reasons, "I obviously disclosed the situation to my partner" was an overreaction. You did not place her at risk for HIV or any other STD. So I'm not going to speculate about the appearance of her cervix, which cannot possibly have anything to do with your extramartital activities -- and for those reasons I expect her STD/HIV test results to be negative. (If positive, you'll have to look to sources other than your Mazatlan exposure.)
So try not to worry about this. You'll obviously have to deal with your symptoms, if they persist, and with the emotional/relationship issues. But you can entirely forget HIV or other STD consequences from all this.
Here is the thread on HIV testing intervals:
I hope this is helpful. Best wishes-- HHH, MD