I had a hiv blood test 4 weeks after a possible exposure, and an oraquick test 6 weeks and 9 weeks. all came back negative. are these results reliable?

Yes: The oral test is as reliable at the blood test. At 9 weeks, your chances of turning positive with your negative tests is very very small. However, most studies recommend testing up to 6 - 12 months, depending upon the type of exposure and amount of information available from the source of the exposure.

Timing of test: The tests are reliable but it takes variable amount of time for different people to make antibodies to the virus. Do repeat the test up to six months after exposure and god forbid it turns up positive, get a confirmatory test. Please consult your doctor for proper counseling. Keep in mind that post-exposure treatment markedly reduces the risk of infection, provided you get treatment asap.

No: Just like the test information states, need to test 3 months after exposure to be sure. These negative tests would indicate that did not already have HIV before this exposure. Viral incubation or time to contract a disease after exposure with HIV or hepatitis can take long time (up to 6 months with hepatitis). Retest at 3 months.

Mostly: I'd do one HIV elisa 6 weeks later to confirm. And reduce your exposure risk;and if that is not possible look into new preventive rx.