You used a condom, so you didn't have a risk to begin with. Even if you had a risk, your tests would have shown positive by now. Since you didn't have a risk, it doesn't matter. Please do not waste any more time testing or even thinking about this.
so I do not need to follow up with a blood test? this test result is conclusive and i've just had a strain of bad luck?
Three months after last exposure is conclusive. You do not have HIV.