I started having brown CM yesterday afternoon followed by pinkish brown bleeding. AF not due until the 11 and my period is usually right on time (maybe a day early) but never 7 days early. I was 7DPO when it started and now 8dpo and it's sill here not so heavy but definitely noticeable. Had to put a tampon in. Any thoughts of which it might be? Implantation or early period? Thank you !