Has anybody been late on their period after getting their first Depo Vera shot???

Hey everybody so I got my first depo shot last month the last day of my period, they told me it will be 24 hours until it was effective me and my partner had sex 3days later no protection and have been since.. My period was due sunday and still isn't here,,,, Was just wondering the shot may delay my cycle date?? Has anybody else had this problem?