Me and my boyfriend always have unprotected sex because I've been on birth control for about 2 years now. My period is always on time and always last for 4 days. My period was due to come on Sep. 13th and I didn't notice anything until I was 5 days late, I noticed some very, very light pink on the paper, only when I wiped. The next day (the 6th day I was late) I had some brown with red and mucus discharge. Throughout the day it got to be bright red/ pinkish in color and just to be sure I put a tampon in before work, and I changed it 3 times within a couple hours and there was barely anything on any of them. Usually I can fill up a regular sized tampon. I can tell that this isn't like my usual periods because it is so light and it seems more watered down I guess you could say. So what I'm trying to figure out, could this be implantation or just a late and very light period? Thanks!