Its been 8 weeks since I stopped taking contraceptive shots (Nur-Istrate).I've been spotting for 5days and had unprotected sex with my husband on the 6th day of Spotting,the spotting stopped after having unprotected sex... I found out that spotting is a sign of fertility if one is not using any form of birth control. Could I possibly be pregnant or how soon could I take a home pregnancy test after having sex while spotting?

HPT is most reliable 10 days after a missed period using first morning urine.

You had unprotected sex. Yes, you could be pregnant.

So soon after coming off birth control, it is doubtful,

Spotting is also a sign for dozens of things.

But you have to wait till you miss a period and wait 10 to 14 days after you miss a period