There are four main ways to check if you have AIDS: 1. Self-examination of symptoms. During the acute infection period of AIDS, acute phase symptoms similar to the flu with fever as the core will appear in about 2 weeks. But this kind of judgment is very inaccurate, because the acute symptoms of many HIV-infected people are not distinguishable from common colds, flu and other febrile diseases. 2, testing for HIV antibodies, HIV antibodies can be checked at the hospital or CDC 3 weeks after high-risk sex. 3, doing 4 generations of combined antigen and antibody testing, mainly increasing the detection of antigens, can be checked about 2 weeks after high-risk sex. 4.Test for HIV nucleic acid, also known as HIVRNA, can be done about 7 days after infection with HIV to detect whether you are infected with HIV.