Maybe oops?

So I’m 7 weeks postpartum now, I was spotting last Saturday and it stopped Tuesday night after getting my depo shot Monday morning. The nurse told me I was good to go since I was bleeding & it’s after 6 weeks so they consider it a period. So we had sex Monday night. But now I’m wondering if I was really protected since I stopped bleeding Tuesday 😬

My normal periods pre-baby have been consistently 14 days long. I’m not breastfeeding. Anyone else stop bleeding right away after depo? The first time I was on it I started it mid cycle but then bled for 2 months straight (nothing for the 4 years I was on it after that though) or have a super short first period? Lol I don’t know what’s going on but I’m counting down the days to take a pregnancy test now just in case.