If your test is negative, you were either not infected with HIV, or you have been infected with HIV, but your body has not yet produced enough HIV Antibodies for the test to detect them in your blood.
If you had an unprotected sexual encounter or shared needles with anybody within the three months prior to your test, you can talk to your doctor or HIV Counselor about when you should be re-tested. During the time you are waiting to be retested, it is recommended that you abstain from sex or use a new barrier/condom with each sexual act during this time. It is also recommended that you refrain from sharing needles during drug use.
If your last unprotected sexual encounter or needle-sharing encounter was more than three months before your test and your test is negative, you now have the ability to remain negative by obtaining education on how to participate in safer sex practices. Visit the CDC to learn about safer sex practices.