2 days late on clomid (clomiphene) negative hpt. how long should i wait to test again?

Can retest in 1 week: 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.