My period isn't due until 10th Feb but I've been getting mild af type cramps since yesterday. I've never got cramping mid-cycle before and I've been having periods for a long time lol I'm only 5dpo though so I know that it's far too early to be a pregnancy symptom. I have very regular 28 day cycles and ovulate on cd15. What are the chances af will show up almost two weeks early? And if it's not af, what could it be?