Hi, I Took A Depo Provera Shot, But After A

hi,
i took a depo provera shot, but after a sinus infection, i started bleeding after the first antibiotic pill, the next shot was due three weeks later, so i took in hope that the bleeding would stop.After 6 weeks of bleeding the docter gave me norethisterone and the bleeding stopped after three days. i am taking one pill a day. How long should i keep taking the norethisterone? and will i be bleeding after i stop taking them, having in mind that i am still on the depo shot?