The best way to know if you have HIV is to take an HIV test. If you have certain risk factors (for example, if you are an intravenous drug user or a gay man engaging in sex without a condom) or believe that you might have HIV, getting tested regularly is important. It’s important for your own health to get tested–you will be able to start medications that will help–and it’s also important for the community–you can be more careful about possibly transmitting it to others.