Projected period was supposed to come 5/9 but still hasnt come.. would a first response hpt be accurate at 3 days late for period? taking with first morning urine; have never had penetrative sex, but mutual masturbation & oral

Patience...: Today's home pregnancy tests are very accurate, but if done too early, a negative result may be due to testing too soon. A correctly done urine test gives a reliable result 3 weeks after sex (3 weeks after when conception might have been) or 1 week after missing a period. She can repeat a negative test if she did the test too early, such as less than two or three weeks after having sex.