I have been on depo for 6 years. I stopped and did not for my shot in July 2015. Have had brown discharge the 28/08/2015 and again yesterday with some pink blood. Was excited cause I thought my periods returned but nothing this morning, I just stopped bleeding. I read about implantation bleeding but I also read that it takes about 6 months for depo drug to leave your body. It is to early to do a pregnancy.