I am on CD 17 (usually have a 26 day cycle) and I just had a light pinkish/brown CM. I am pretty sure I ovulated 3, maybe 4 days ago based on CM.  It seems to early to be implantation bleeding, but i didn't know if anyone else had experienced it this early. I am also super tired (could also be because I am a teacher who just started back at school) and get nauseous if I don't eat every few hours. Any ideas/advice?