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Symptoms after testing HIV negative at 7 weeks

Question: 

I had unprotected oral sex 9 weeks ago. I used a condom for vaginal sex but it broke, and I stopped immediately when I noticed. I'm a 21 year old straight male. At 7 weeks, I tested negative for HIV, syphilis, gonorrhea, and chlamydia. I did however have some bumps on my penis which the doctor said was molluscum. She froze them off.
2 days after getting tested, I had a very mild headache for a few seconds. The same thing happened a few times last week and has increased to every few hours in the past few days. I'm also experiencing a lot of tiredness and fatigue all day. I just checked and I am running a very, very mild fever (less than half a degree F). What could be the problem? Should I trust the HIV test I got after 7 weeks? I'm very stressed, nervous and paranoid. I just can't get this out of my head. I am going to see a doctor tomorrow.

Answer: 

Hello,

Thank you for your inquiry. From what we gather from the question, you were asking if there is a possibility of a false negative resulting from the HIV test you received approximately 7 weeks ago. Assuming that the test you received 7 weeks ago was a 4th generation HIV test and was conducted appropriately, testing accuracy is known to be approximate >99% for this particular screening method.

Recommendation: Refer to your physician for a more personalised answer.

Regards, AIDS Vancouver Helpline/Online, Cody