You should be tested for HIV if you:

• Had unprotected sex. The greatest chance of becoming HIV infected is by having contact with an infected person’s blood, semen or vaginal secretions.
• Have an existing sexual transmitted disease (because it increases your chances of becoming HIV infected).
• Share needles.

Even if you’ve been infected with HIV, you may not know it right away because you can look and feel healthy for many years afterward. It’s important to know that you have to be HIV infected (HIV positive) and turn ill to have AIDS. While HIV antibodies can be discovered 3 months after exposure, it’s best to be certain by being tested again at 6 months.