There isn’t any one time frame where all STDs and HIV should up, therefore, there isn’t a simple answer to this question. If you have had unprotected sex and are worried about an STD or HIV, you should get tested 1 to 2 weeks after and again 90 days later. This is because different STDs are detected at different times: 1  Chlamydia-anytime from 1 week to 3 weeks. 2  Gonorrhea-anytime from 2 days to 30.