Good evening everyone. Sorry for the broken english. 74 days ago, I had unprotected vaginal sex with a sex worker. 32 days after the exposure, I got a megative result with a double test result from the device called siemens advia centaur xp. 46 days later, I got a negative result from the same device. 48 days after exposure, I applied to another institution to have Vdrl-rpr checked. My HIV result was negative but although I was protected from hepatitis B virus, it was borderline positive. I have read that this can happen in HIV + individuals. After 59 days, I tested with a cobas brand device in another institution and got an HIV negative result and I got a negative result from HBW-DNA. I could not overcome anxiety, and 73 days later in another institution, my hepatitis and HIV result was perfectly negative. I don't know the device, probably the 4th generation was not mentioned at the end, it was just writing anti-hiv. I would be happy if you share your knowledge and experience with me.