From the moment you get infected until you show the symptoms can be from 8 to 10 years. Better see a doctor.

AIDS (acquired immunodeficiency syndrome) is caused by a virus called HIV.

people generally get infected by:
- having sex with an infected person
- sharing a needle/shooting drugs with someone who's infected
- being born when their mother is infected
- drinking the breast milk of an infected woman

You can't be sure with external signs, if you think that there is a chance you are infected with HIV you have to do a blood test to be sure.

You wouldn't just automatically have the symptoms of AIDS. If you think you could have HIV/AIDS then you need to go see a doctor.