I had a period from Sept 4 to Sept 13. My period stopped and now I'm bleeding again Sept 16. I had implanon in my arm but I has expired, however since then I've been having regular periods once a month lasting about a week. My period Sept 4 was like that old blood a lot of brown clots and now it bright red or light orangish. I only see it when I go to wipe. Is this due to stress? I've never experience this before. What exactly are the reasons why or how this could happen? I haven't had sex in over a year so I know there's no way I'm preganant. Please help me?