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Most people develop detectable HIV antibodies within three months of infection, the average being 20 days. In rare cases, it can take 6-12 months. For this reason, the CDC recommends testing six months after the last possible exposure, i.e, unprotected vaginal, anal, or oral sex, or sharing needles. You can be tested at your doctorâs office, local health department, hospital, and sites specifically set up to provide HIV testing.
Rating Newest Oldest. Best Answer: chlamydia/gonorrhea urine test - wait 2 weeks after exposure since it takes that long to show up on this type of test. HIV blood test - takes 3-6 months for a conclusive result. If you are having std symptoms soon after exposure, you can still go to the dr for a physical exam.