When can I test? Window period calculator
Enter the date of your most recent sexual contact or exposure. You'll see the day each test can first detect an infection and the day a negative result can be trusted. Everything runs in your browser; nothing is stored or sent.
That was less than 72 hours ago. If there's any chance of HIV exposure, go to urgent care or an emergency room now and ask about PEP. It must be started within 72 hours. Test later on the dates below.
Your testing dates
CDC gives no single window for chlamydia, gonorrhea, trich or syphilis; their dates use the NHS's cautious "up to 7 weeks". Symptoms? Don't wait for these dates: get tested and see a clinician now.
Based on the window periods in our window period chart. General information, not a diagnosis.