So i took plan b one step within the 72 hrs after having unprotected sex. However, i am also on the depo shot. Only thing is at the time of me having unprotected sex i hadnt yet got my next depo & im not sure if my last one held on that long. But right after i took the plan b one step pill, i immediatley went to get my depo shot the next before it was too late. I havent really had any symptoms such as bleeding or anything like that, im just not really sure if it really worked or not..