K.N.
Hi K.,
I had this problem once a few years back. I started taking the pill back when i was 16 because my periods where irregular. We all know that we have to go every year to have our exam to make sure everything is good in that area. Well about 5 to 6 yrs of taking the pill and i was on Ortho Tri Cyclen, I started to get break through bleeding they called it about 2 weeks before my period was suspose to start. Well at first I thought it was just stress cause that will cause you every once in a while to start sooner the you should. I thought well I will just wait to see if it happens again next month. It did and the month after as well so I thought it was a good idea to make sure nothing was going on. So I went to the Dr. and told them what was going on, they got out their handy little book and looked up my systoms and told me I wasn't getting enough of the progestrian (spell)hormone and put me on another pill Ortho Novem 777. Once I started taking that the problem went away. So you might just want to ask your dr. and see what they have to say but all I can say is something isn't right if that is happening. I hope you find this helpful and good luck!!
K.