on pill, light bleeding 2 weeks before period

the same thing is happening with me! it seems lke it happens every other month. like one month it will be perfectly normal, and the next month it will be a reallyreally light brown color that starts 2 weeks before my expected period and continue until i get my period
its really annoying
im really just wondering if i should change my dosage and up it something... and it shouldnt be that early breakthrough bleeding because ive been on the pill for a while now

I'm going thru the same!! I've been on Diane-35 for the past 5 years, ever since I was diagnosed with PCOS.

I started my last period on 01/05 and it was pretty normal, the usual 3 to 4 days; then I started spotting on 01/20 (and still I'm).
I'm not supposed to get my period until next weekend (02/03).

I also should mention that I've been having unprotected intercourse with my bf so I took a pregnancy test and it was negative.

Does anyone know why this is happening???

Thank you in advance for the responses!!

I've been off the pill due to medication, and have been really careful while having sex. But now it's 2 weeks before I'm due, and having a brown bleeding/discharge. What does this mean?