Worried about birth control

Erica

I sadly have PCOS I had a baby 8 weeks ago thankfully. My doctor put me on birth control because I’m not ready for another baby. I finished one pack of pills and now on my second pack and never missed a day well I started bleeding and the pills have not changed color yet. Does this mean the birth controls not working should I be worried. I called my doctor and the receptionist said I should here something in 72 hours.