... scared, i got my period on March 15 got the Depo shot for the first time ever on March 17 "on the 3rd day of my cycle" and my period ended on the 19 of same month... But i had unprotected sex on the 25 of march at midnight. Im scared i could get pregnant because my doctor said to wait 1 month before having unprotected sex, she said that it takes time for the depo to work because its my first time and i have never used birth control before? Or why would she say that... Should I be worried? I searched online and it said Depo shot works instantly when you get the shot while on our period? Or should I just take plan B just incase? Please help me im not ready to have kids... Thanks