Shot delaying period!

Lynsey

Hi. I’m 10 weeks pp got my period at 6 weeks pp and received my first depo shot 1 week ago. Period should have started Tues/Wed of this week but nothing. Was 28 day cycle before baby. Have had wed twice but both times with a condom? Is it just the shot that is delaying my period or my body still trying to get back to normal!