t get a positive pregnancy test until I
missed my
period. Yesterday or today should show you a positive home
pregnancy test if you are pregnant. If you are indeed pregnant, it goes by the first day of your last period. If you started your last period on February 15, then you would be approx 29 days pregnant which is about 4 weeks and 1 day. You can't always determine that you are for sure having implantation bleeding though so make sure you are really pregnant.
Good luck!