Depo shot

So I was covered on the shot from dec. - March ( I was supposed to take it again in March but didn't) and I keep hearing different things about the fertility rate like once you stop taking it you can't get pregnant for a couple months and other things like the pregnancy rate goes up once you stop taking it..I'm confused. also I had intercourse this week and we used a condom but I'm not sure if he came because I started bleeding and we stopped and it made me have my period again this is the second time this month I got my period, is there a chance that I could get pregnant?