Pregnant on Depo Shot

Has anyone here gotten pregnant while on the depo shot? When I had my son I wasn’t on any birth control. I was sick all the time and late on my period. So I knew I was pregnant but had 27 negative pregnancy tests, before I finally got my positive. I was 9 weeks pregnant by this time. I have no period on the Depo, so I can’t go off that. But for two weeks straight I have been nauseous 24/7 and after every time I eat. I’ve taken 3 tests and they’re all negative. Any advice?