Had unprotected sex in february period came 2 weeks after but was very short and light i'm now 6 days late for this month pregnancy test - pregnant?

Tests are accurate: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or a week after missing a period. If done sooner, a negative result may be due to testing too early such as less than 2 weeks after conception.