Do early detection pregnancy tests work if you are in the implantation stages and spotting slightly? i'm due for my period in 3 days.

See Below: Home pregnancy tests can show positive as early as 3-4 days after implantation. Implantation generally occurs 6-12 days after ovulation. So if the egg was fertilized right at ovulation and you used the most sensitive home test it could be positive at 9 days. On average it is 13-14 days after fertilization/ovulation when it is positive. We generally recommend you wait until after you miss a period