Okay question for all ladies who have been pregnant before

Jessica
How many days before or after did you get a positive pregnancy test. Im a day late. And tested negative(not first morning urine) was negative no sign of even a faint line... So im going to test tomorrow morning again with fmu. Is it possible that it would take a while after missed period to show up??? Or does this mean that im prob going to get my period... Ughh so stressted about getting a negative today.