Depo Shot

I have been on the Depo shot for 4 months now. On my first shot the bleeding never really stopped, I had spots of blood almost everyday and when I went for the second shot the Doctor told me that this one would most likely stop my bleeding and it did for a while like from the 6th of August until like the 7th of Septmber and now the bleeding has started again, I have been bleeding for 6 days now and I am worried that it might not stop. Should I go see the doctor again or just get off the shot😩😩 I am confused