Need advice

Christina • Rough life... I have 6 children and am currently engaged.. Work to jobs love my kiddies and family

I had my baby girl on January 17th and received the depo shot on January 18th. I haven't gotten one since amd have been using NO form of birth control..

If depo last for three months shouldn't i have gotten a period im april or could it just be screwed up bcuz of giving birth and the shot...haven't had a peeiod since..

HELP ME LADIES.

NEED ADVICE