To become infected with HIV, infected blood, semen or vaginal secretions must enter your body. HIV can happen in a number of ways: Through sex. You can become infected if you have vaginal, anal, or oral sex with an infected partner whose blood, semen, or vaginal secretions enter your body. As you said you have been detected for having AIDS which means you got it from any of your partners from one-night stands. The problem is that as you had a couple of one-night stands, which might be a little difficult for you to find out from which person you got infected. In spite of these, you need to search for the infected person who spread this fetal disease. You should not only do it for your own sake but for all the other people who might get infected by her due to her negligence.

Acquired immunodeficiency syndrome (AIDS) is a chronic, potentially life-threatening condition caused by the human immunodeficiency virus (HIV). By damaging your immune system, HIV interferes with your body’s ability to fight infection and disease.
After finding out the infected person and you should immediately start your medications. The most effective treatment for HIV is antiretroviral therapy (ART). This is a combination of several drugs that aims to control the amount of virus in your body. Antiretroviral drugs slow down the growth rate of the virus.