You missed your deprova injection a week ago could you get pregnant?

Highley unlikely accoding to this http://en.wikipedia.org/wiki/Depo_Provera The average return to fertility is 9 to 10 months after the last injection. By 18 months after the last injection, fertility is the same as that in former users of other contraceptive methods. So a week should not be a big deal and in reading the rest of that you will see it is well within the perfect use scenario IE defined as being no longer than 14 or 15 weeks after an injection (i.e., no more than 1 or 2 weeks late for a next injection.