I am going to make this short and concise.
I am a 26 year old heterosexual male who does not use drugs. I had unprotected vaginal sex with an ex, who I know sleeps around and does not use protection.
39 days after the encounter I visited a local clinic for a free anonymous rapid point-of-care test (3rd generation ELISA, I believe) which was negative.
Being concerned about some minor pain, which I sometimes experienced in my neck, armpits, and groin, I called the test center to ask about the reliability of my test. Oddly, the person I spoke to told me it was not conclusive (as I was not told this during my test) and that I had to be retested at 12 weeks, because my result was only 97-98% reliable.
My questions are:
1) What is considered late seroconversion? Seroconversion after 6 weeks or after 3 months?
2) What are possible reasons for late seroconversion? Only drug abuse and a weakened immune system? Or is it normal for a healthy person to seroconvert later than 5-6 weeks?
3) Do you know people who have tested positive at 3 months after receiving a negative test at 6 weeks?
4) Can painful lymph nodes without any swelling or any other symptoms indicate late seroconversion, if they started during week 6.
5) What would you consider my risk to be? Should I be worried, since I am extremely anxious about my current situation.
There are some very NARROW exceptions to this, mostly involving people taking potent immunosuppressive or chemotherapy medications that would not apply to your situation.
3. With the latest generation tests, the doctors on this site have not seen anybody seroconvert after 8 weeks.
4. NO. Painful lymph nodes don't mean anything with respect to HIV- they probably mean that you have been poking/prodding them too much.
5. At this point, I would not be worried at all, since your negative result is highly unlikely to change at 12 weeks. You should go into your 12 week test expecting another negative result. Your risk was relatively low to begin with and the test you took was very accurate.