Still bleeding...

Vida

I've been taking BC for a year and two months now and I am starting a new pack on a Sunday as my pills are supposed to be taken but I'm still bleeding. This is my 3rd day on the pill and my period is light but still heavy enough to use pads. What's wrong with me? Normal not normal? I can't remember if this has happened before. Probably when I first started to take the pills but again. Been a year and two months.