Thanks for the question. And as you mentioned that you were involved sexually with many partners and also used to have drugs. I am afraid that your doubts might be right. But nothing can be said prior to proper blood test for HIV-AIDS. As of now I can only tell you about the symptoms which are common among people who get infected with AIDS. Like you said, that you are getting tired easily and also facing unexplained weight loss, both of them are the primary symptom of AIDS apart from frequent fever, diarrhoea, and pneumonia.