birth control?

So I started my period when I was 12. I got on depo (birth control shot) when I was 15 (long story). Since then, I didn't have a period. I got off the shot before I got married because, I gained so much weight, and my body was really going through it. Now, and me my husband wanna have a baby. And I just got my period but, it's kind of irregular. My friends say, that the pill helped them regulate their cycle. But, i think "the pill" is like sugar pills, and a joke. But, if it help them get their cycle together, maybe it can help me get regular, so I know when I'm ovulating, and help us have a baby. Y'all have any experience or advice?