off topic, PLEASE READ N REPLY

I'm 24 I have 2 kids 3 and a half yr old and 1 year old. after I had my youngest daughter in April 2017 I got the depo shot before I even left the hospital. I never got it again but my problem is I haven't got my period since I gave birth to my daughter which is 13months ago now. anyone in this position before? ant advice to help bring on AF ? x