My daily Pill

Hi I had a baby 3 years ago & I wasn't on any contraceptive, however I had a C-section & didn't stop bleeding after my baby so after 8 months I went on my pill to stop bleeding & it worked. Now ive noticed if I miss one pill then I start bleeding. I haven't taken my pill for nearly 6 days now & i haven't bled which is weird because i would of bled by now. Could i be pregnant? with that been said i have being trying to get pregnant while on the pill but im not sure if it will work because of the bleeding issue. Please help