Hi I was on the depo shot for only 3 months I was bleeding in between those 3 months. I haven't got the depo anymore but I've been bledding for a week is that normal.

Because works differently with all women, that's why there are so many choices out there. Yes it is normal to bleed while on the depo, the shot isn't as popular as it once was due to the bleeding, pregnancies, and other health related things. There is a law suit against depo also for the problems they caused.
... But to answer your question, depending on how long ago you got off the shot, you could bleed until its out of your system, about 4 to 6 weeks.
Go back to your family planning center and get checked out if you feel you need to