Its best to wait until your missed period so you don't get a false reading from testing to soon. Good luck!
There are some early pregnancy tests that say you can test as early as 4 days before your missed period, but they aren't 99% effective until the day of your missed period. The closer you wait to your missed period, the more accurate the test is and the less likely you are to get a false negative. You won't get a positive until after implantation occurs so some women who implant earlier will get a positive result earlier. It all depends on if you want to risk wasting a pregnancy test.
Sorry, I meant what day? How early can I test?
Best time is early morning if u take hpt.