... within two hours of the accident. Then a couple days later I got the Depo shot since that was the third time a condom had broken with my boyfriend and I and the third time I had to take plan b. The first two times plan b worked and I got my period a week or a little more after taking it. But with this time I still haven't gotten my period and it's been a little over two weeks now. I don't know if it's just due to the Depo shot messing up my hormones (I hear it can eventually stop periods all together) or if I should be concerned about pregnancy. I didn't have unprotected sex with my boyfriend after taking the Depo shot until after the 7 day wait, so I'm not worried about getting pregnant because of that. Also is it possible that the Depo shot could have cancelled out the plan b?