Getting pregnant after depo shot

Lola

Ok so I was on depo for 9 months my last shot was at the end of October of 2017.

I finally got a real period in April of 2018 so we’ve been using no protection and trying for a baby. This past month was May 2018 and no period just spotting two days started May 10th.

I’m gonna take a test Monday to see but I’m wondering if I could even be pregnant? If not how long will it take?