Ok, period is due today (or tomorrow, not 100% sure if I have a 27 or 28 day cycle). I don't have cramps but my boobs are killing me and I can't stop pooping today lol! Is that a sign? I had cramps on and off all last week- was wondering if they were implantation cramps. I haven't had any spotting though. My forehead has been super oily, and that's very unusual for me. Thoughts??