Pregnancy scare.

So I was recently on the depo shot for 9 months. And I would get my period n stuff . N before these 9 months I was on the depo shot before for 3 months n soon as I got off I got my period . But this time . I didn’t get my period n it’s been a whole month now .. n I had unprotected sex . Where he nutted inside of me . Now my period 10 days late . I think I’m pregnant but i really don’t know.