I got the birth control shot August17 a week before I had my period. I normally have really heavy periods but I had spotting and light cramps. I missed September but I had a few cramps but no bleeding. My boyfriend and I have had sex but without a condom but he always pulls out way before anything happens and he's been doing that for a long time and I got my period. But ever since I got the shot, I haven't bled. So I don't know if I'm pregnant or if it's just birth control.