Help with calculations and an HPT?

I got my BFP 2-3 days before my missed period but it ws very very faint, so i guess just try to wait for 4 days it's for the best :) but if u cant wait just try an early response HPT and i am eeping my fingers crossed for u . If u turn out pregnant that will make you 4 weeks and 1 day if u get your BFP today ... Good luck