If you aren't sure when your period is due, wait 21 days (3 weeks) after unprotected sex.
Wait until at least one day after your period was due . when should you buy a pregnancy test
Clinical blood tests can detect pregnancy even earlier—about 6 to 10 days after conception —because they are more sensitive than urine tests. Factors Affecting Accuracy Pregnancy Test: When To Take, Types & Accuracy If you aren't sure when your period is