As it's already been around 12 weeks post exposure, just take an antibody test at that time ((12 weeks)) for a conclusive result.
Completely agree with Aldrick. Side note, you mentioned that you have sore throat now. ARS occures between 2 to 6 weeks after encounter. Rarely 8 weeks. So your throath symptom is not from HIV.
Additionally, eventhough vaginal sex is risk it's by experts considered not high risk. Like aldrick said 1/2000 chance normally, when uncircumized appeox 1/1000 per act. And a lot off experts even think the chance is even lower. Nevertheless, you needed to be tested for std's. Not only HIV. I would recommend chlamydia, gonno, hiv and syphilis. But for HIV, I think your have had low risk.
Hello, insertive vaginal intercourse carries some risk for HIV but not the highest one, on average it's said that the risk from an event like the one you describe is 1 in 2000, while receptive anal sex is more then 1 in 100. That given your partner was HIV +. But you don't know your partner status, so your chances are even lower because not everybody is HIV+. I'm not saying you weren't at risk, I just want you to keep it in perspective.
It's not worthy to refine those calculations because they are just general estimations.
You were at risk and need testing, a 4th gen test, it doesn't matter if it's a quick one, taken 4-6 weeks after that exposure will give you an excellent indicator about your status and it's very unlikely to change.
About symptoms, ARS is the first stage of an HIV infection, is the body’s reaction to the infection. Some HIV positive people, but not all of them, reported that around 20 days after their exposure they had fever, sore throat, rash and flu (not cold) like symptoms, all of those came together, or within a few days of difference and lasted for a few weeks.
As you see, the same symptoms are present in many other illnesses and not everyone had them, so, we can’t rely on them to diagnose HIV, you should go for testing.