i got off the depo this month, but i only had one shot. i was bleeding for 1 1/2 months. im taking a birth control pill called mircette and everything is fine. but different people get different symptoms. for example your body was able to deal with the depo shot, and my body wasnt.
i think it could be the new birth control. if this continues i would ask your doctor to put you on something else, or take a break. its up to you.
one thing you can do is go to the search engine and find out about the side effects of your birth control.