Hello , I am a first time user of Depo Provera and I'm curious as to how it works, as well as worried about becoming pregnant. I just recently had my first shot on 6-28-16, and then a week later I went over to my boyfriend's house, and had unprotected sex on 7-9-16. I have heard from many online, as well as friends of mine, and my own doctor who told me that I am supposed to or should be using extra forms of protection for about 2 weeks after getting my first Depo Shot, because it takes time to fully work (especially if you got it after 5-7 days of your period) I got mine 3 days before my expected period(which is after my last period) and I'm unsure if that means it will take longer for me or not. Is it possible that I could end up becoming pregnant because of this???