Anyone get pregnant after depo shot?

I had my baby girl last year September 23rd. Went on depo in March I believe and only got to shots. My last shot was in May. I was new to BC and my obgyn did not tell me that depo would take a while to get out of my system. I still haven't gotten my period back and just wondering how long did it take to conceive. Also did going on the pill help regulate and bring your period back?