I don't think you are infected.
I don't know anything about a WB outside of the US. You'd have to find out what lab ran the test, etc.
However, it takes up to 4 months to develop antibodies, not 6. Your test 5 is absolutely conclusive.
I don't know what has caused your symptoms, but have you had any other testing done? Since herpes sores wouldn't disappear in 2 days, you need to further investigate this. Have you had testing done for gonorrhea, NGU/NSU? You are also at risk for syphilis from oral sex, though your symptoms don't sound like that.
You should also talk to your doctor about an infection in your prostate, which would be unrelated to your encounter.
You could also have a fungal infection, balanitis, or many other things. Has a doctor actually LOOKED at it? Examined you? You need to have an exam and other testing done. Herpes is not the cause of your symptoms.
Oh I'm sorry - I read that wrong. At 87 days/13 weeks, your test is about 92% accurate. Given that you used a condom, I'd expect your hsv2 to remain the same, and it's quite likely your hsv1 will as well.
2 - That's not true. It takes up to 4 months. Without having hsv1, you probably would have already tested positive if you had it.
3 - Absolutely, totally agree with your doctor. I don't think you need to test again. False positives happen, and they send people down a really bad road. I see no reason to think this is herpes at all.
You took a LOT of antibiotics for a long time. It's quite possible that you've developed a fungal infection from those. Talk to your doctor about it.
Continue to work with your doctors. I don't think this is an STI. Talk to them about the possibility of prostatitis. It can give you the symptoms you've had.