My luteal phase is 11 days without fail....usually....This cycle it was 13 days. I had some spotting on day 12. On day 13 I was woke up at 2am with cramps like I have never felt before. It was like someone was wringing out my uterus. I took some pain meds so I don't know how long they lasted...at least 45 minutes before I gave up and took the pills. This morning AF was meduim and clotty, but no cramps. And now, later in the day on day 13, I am back to spotting. Can anyone shed some light on this?