Had protectd sex on 18 feb and was on regestrone till 18 to delay periods aftr which i got my periods on 24.but ths mnth m late by 5 days m i pregnant?

Probably not, and...: 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 will give a reliable result 3 weeks after sex (when conception might have happened) or 1 week after missing a period. A woman can repeat the test if she did the first test too early, such as less than two weeks after conception.