Hi I'm on the yaz birth control pill and about a week ago I accidentally took the wrong active pill (I took one that was 6 days forward from the one I was supposed to take) and then I just went back and continued the pills normally. I just got my period and I have four active pills left and then four inactive pills. Does this mean my period will last till I begin next months active pill? Before I began the pill my periods were 8 days long and very heavy but on the pill are much lighter and only four days. I'm worried I will have a horrible long period. I've been on the pill for 6 months. What's going on?