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Still thinking on HIV

Question: 

I am from India, 34 years male, I have a few exposures in past when I was young and bachelor(12 to 13 month before) one or two among those were unprotected but after having family I had the last one almost 98th day back(though it was protected).I started feeling guilt and shame, and promised to self to return to life, leaving all this.A strong belief got in my mind that I am infected and started testing after the last exposure(which was though protected).I cannot think anything else than this my professional life shattered.
I first tested the source lady(a spa girl) with whom I had protected vaginal sex 98 days back on 5th day /7th week/9th week/12 week from date of exposure and she is negative in all in all teh time.I was testing her so many times only to know whether she was on window period.I tested her on ECLIA COMBO DUO and WESTERN Blot and all negative.

Now my turn I tested myself on 10th day/15th day/18th day/28th day/35th day/42nd day/50th day/56th day/87th day/97th day with HV AG/ab combo test only and all came back as negative.Done it from two different renound labs alternatively.
I tested on VDRL/TPHA/HBSAg/HCV all came back negative.
Question:
Can I get piece of mind and be 100% sure that I am not infected myself from any of the past exposures or the latest one?
Do I need to have any special test for my previous exposures to find out if I was infected in past but antibodies may have got vanished or depleted to be picked up by test?
I have no as such issues currently except a stiff neck that might be due to self examining my lymph nodes I use to move my neck quite rapidly and may got this strain, but not sure.

I take BP medicine Telday 40 mg and sometimes antibiotics as prescribed by doctor for normal cold and cough no other meds of any type.Can this meds interfere and delay window period?

I left this path already and will live normal life now and what is your take on me am I HIV negative?

Answer: 

Hello and thank you for contacting the AIDS Vancouver Helpline.

We understand that you are inquiring about the accuracy of a fourth generation EIA (DUO or COMBO ab/ag test), performed at 97 days after your last potential exposure to the HIV virus.

According to the Canadian AIDS Treatment and Information Exchange, fourth-generation HIV tests can detect HIV infection in 50% of people by 18 days after infection; 95% of people by 34 days after infection; and 99% of people by one and a half months after infection. Fourth-generation HIV tests have a sensitivity of about 99.9%. In other words, if 1000 HIV-positive people were tested for HIV, 999 would test positive and one would incorrectly test negative. Since the vast majority of people who get tested for HIV are actually HIV negative, the chance of a negative result being false is extremely low.

Based on the timeline you provided, you have tested negative at least four times past the one and a half month mark. Neither blood pressure medications or antibiotics can affect an HIV test result. Assuming you have not had any further exposures in the meantime, you can be confident that your multiple HIV tests were accurate, and that you do not have HIV.

Regards, AIDS Vancouver Helpline/Online, Dyson