I have a question. I had my last period last November 08. It lasted for 4-5 days. Then I started a new pack of pills on November 23.. today (December 13) is my last pill, but im surprised that I've seen a drop of blood when I went for pee. Why it's like that? Is there any problem? Before when I'm using the same pills I'm having my period 4-5 days after my last pill. Please answer me. I'm kinda worried. Thanks in advance