I've had spotting/bleeding while transitioning onto a new birth control twice now. It went away within a month both times. I'm hoping it's just your body adjusting to the new cocktail of hormones that is your birth control. If not, it might be that that birth control isn't a good fit for your body/hormones. Some birth controls are supposed to be better for endo than others. I used to be on Yaz and liked how I felt on it- upbeat mood wise-, but the doctor said my endo grew through it. I'm now on oestrin and feel like a robot most of the time but its supposed to be better at stopping the endo. Good luck!