Is this common?

I've been on the pill since the beginning of the year, never had a problem until the last two months (June and July). I take my pills as I am supposed to but I am having bleeding when I'm not supposed to. I bleed from anywhere between two to a week before I take the sugar pills. It is also constant from when it starts and only ending at the end of my period. The bleeding also isn't just spotting but more filling a pad. At first I thought it was from unprotected sex since I just started again since the pill but this seems excessive. Could my body just still be settling to the pill?