When should I get tested?

It depends on when you may have been exposed. You may have the test after the window period, which is generally 3 months since the last time you are at risk. The window period means the time it takes for a person who has been exposed with HIV to show a positive antibody test result. However, if you had an antibody test less than three months after you might have been exposed, you should plan to get tested again to make sure you have not been infected from that episode of exposure.