With my three year old i wasn’t late at all yet in fact it was about a week b4 i was supposed to start. However, like two weeks ago i thought i may have been pregnant so i waited for my period to come and when it didnt the next day i took a test and it was positive. I think typically they say that it may be positive up to 4 days b4 ur period and every day your late your chances of accuracy increase. But i think it depends on when during the month you got pregnant and your levels of hgc. Hope that helps.
-Emily